For most iPhone owners, the Apple Watch Series 11 is my best overall pick among watches with ECG, while the Withings ScanWatch 2 suits buyers who prefer a classic watch face and the Fitbit Sense 2 offers a broader wellness focus. Your choice depends on more than whether a device can record an ECG: phone compatibility, comfort, battery routine, and how you want to view health data all matter. Some options are full smartwatches, while ScanWatch models trade a screen-heavy experience for a traditional look. I also include the KardiaMobile 6L as a dedicated EKG device, not a watch, for readers who prioritize recordings over wrist features. Read on for the full comparison and guidance on choosing the right ECG option for your needs.
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Key Takeaways
- Apple Watch Series 11 leads for iPhone users who want ECG alongside a full smartwatch, with 42mm and 46mm sizes offering different wrist fits.
- ScanWatch 2 is the clearest style alternative for buyers who want ECG capability in a hybrid design rather than a screen-centered watch.
- Fitbit Sense 2 appears in three color variants; the color changes, but the core decision is whether Fitbit’s wellness approach suits your routine.
- Galaxy Watch 8 and the older Galaxy Watch 4 serve different priorities: newer hardware versus a more established, compact option, with Android compatibility central to both.
- KardiaMobile 6L is not a watch; it belongs on the shortlist only if a portable, dedicated EKG recorder matters more than wrist-based notifications and activity tracking.
| Apple Watch Series 11 GPS 42mm with Rose Gold Aluminum Case and Light Blush Sport Band (S/M) |  | Best Overall for iPhone Users | Case size: 42mm | Case material and color: Rose gold aluminum | Band: Light Blush Sport Band, S/M | VIEW ON AMAZON | See Our Full Breakdown |
| Fitbit Sense Health and Fitness Smartwatch with GPS, Heart Rate, SpO2, ECG, Skin Temperature and Stress Tracking |  | Best for Multi-Day Health Tracking | Dimensions: 1.59 × 1.59 × 0.49 in | GPS: Built-in GPS and GLONASS | Health features: ECG, heart rate, SpO2, skin-temperature trends, stress, and sleep tracking | VIEW ON AMAZON | See Our Full Breakdown |
| Withings ScanWatch 2 Hybrid Smartwatch |  | Best Hybrid Design and Battery Life | Case: Stainless steel | Glass: Sapphire | Battery life: Up to 35 days | VIEW ON AMAZON | See Our Full Breakdown |
| Samsung Galaxy Watch 8 (2025) 40mm Bluetooth Smartwatch – Graphite |  | Best for Samsung Health and Android Features | Size: 40mm | Connectivity: Bluetooth | Compatibility: Samsung and other Android smartphones | VIEW ON AMAZON | See Our Full Breakdown |
| Smart Watch for Men with 120 Sports Modes, 1.83″ HD Display, Alexa Built-in, Heart Rate & Sleep Monitor, IP67 Waterproof, Bluetooth Call & Music Control, Compatible with iPhone/Android |  | Best for Basic Fitness on a Large Display | Display: 1.83-inch HD IPS | Resolution: 240 × 284 | Sports modes: 120 | VIEW ON AMAZON | See Our Full Breakdown |
| Fitbit Sense 2 Health and Fitness Smartwatch – Shadow Grey/Graphite |  | Best Fitbit for Stress and ECG Tracking | Color: Shadow Grey/Graphite | Battery life: 6+ days | Water resistance: 50 meters | VIEW ON AMAZON | See Our Full Breakdown |
| Fitbit Sense 2 Health and Fitness Smartwatch, Blue Mist/Pale Gold |  | Best Fitbit Colorway for Everyday Wellness | Color: Blue Mist/Pale Gold | GPS: Built-in | Exercise modes: 40+ | VIEW ON AMAZON | See Our Full Breakdown |
| Withings ScanWatch 2 Hybrid Smartwatch, 38 mm |  | Best Hybrid Watch for Long Battery Life | Case size: 38 mm | Case material: Stainless steel | Glass: Sapphire | VIEW ON AMAZON | See Our Full Breakdown |
| Samsung Galaxy Watch 4 40mm Bluetooth Smartwatch with ECG, GPS, and Fall Detection – US Version, Black |  | Best for Samsung Phone Owners | Display size: 40 mm | Model: SM-R860NZKAXAA | Connectivity: Bluetooth, LTE, GPS | VIEW ON AMAZON | See Our Full Breakdown |
| Fitbit Sense 2 Health and Fitness Smartwatch, Lunar White/Platinum |  | Best Light-Finish Fitbit for Daily Wear | Color: Lunar White/Platinum | GPS: Built-in | Water resistance: Up to 50 meters | VIEW ON AMAZON | See Our Full Breakdown |
| KardiaMobile 6L EKG, No Membership Required, Unlimited Recordings, HSA/FSA |  | Best Dedicated ECG Device | ECG leads: 6 | FDA-cleared: Yes | Arrhythmias detected: 4: AFib, bradycardia, tachycardia, and normal sinus rhythm | VIEW ON AMAZON | See Our Full Breakdown |
| Apple Watch Series 11 GPS Smartwatch, 46mm Jet Black Aluminum Case with Black Sport Band (M/L) |  | Best for iPhone Users Who Want an All-Round Health Watch | Model: Apple Watch Series 11 | Connectivity: GPS | Case size and material: 46mm jet black aluminum | VIEW ON AMAZON | See Our Full Breakdown |
| watches with ecg | Battery life | Water resistance | Compatibility |
|---|---|---|---|
| Apple Watch Series 11 GPS 42mm | — | — | — |
| Fitbit Sense Health and Fitnes | Up to 6+ days | Up to 50 meters | iOS 12.2 or later; Android 7.0 or later |
| Withings ScanWatch 2 Hybrid Sm | Up to 35 days | — | Android and iOS |
| Samsung Galaxy Watch 8 | — | — | Samsung and other Android smartphones |
| Smart Watch for Men with 120 S | 5–7 days active; up to 30 days standby | IP67; water resistance depth listed as 1 meter | iPhone (iOS 9.0+) and Android (5.0+) |
| Fitbit Sense 2 Health and Fitn | 6+ days | 50 meters | — |
| Fitbit Sense 2 Health and Fitn | 6+ days | 50 meters | — |
| Withings ScanWatch 2 Hybrid Sm | Up to 35 days | 100 meters; IPX8 | Android and iOS |
| Samsung Galaxy Watch 4 40mm Bl | — | — | — |
| Fitbit Sense 2 Health and Fitn | 6+ days | Up to 50 meters | — |
| KardiaMobile 6L EKG | — | — | Most smartphones and tablets |
| Apple Watch Series 11 GPS Smar | Up to 24 hours of normal use | Up to 50 meters | — |
More Details on Our Top Picks
Apple Watch Series 11 GPS 42mm with Rose Gold Aluminum Case and Light Blush Sport Band (S/M)
For an iPhone owner who wants ECG alongside a broad set of everyday health and safety tools, the Apple Watch Series 11 is my most balanced pick. Its ECG sits alongside heart-rate alerts, sleep tracking, Vitals, and possible hypertension notifications, while fall and crash detection add practical safeguards beyond health logging. Compared with the Withings ScanWatch 2, it offers a brighter, always-on digital experience and more connected safety features; Withings is the stronger choice if long battery life and an analog look matter more.
The tradeoff is daily charging: Apple lists up to 24 hours of normal use, though a 15-minute charge can provide up to eight hours. This GPS model is also an iPhone-oriented choice, not a flexible Android option. Its 42mm case, 50-meter water resistance, and fast charging make it versatile, but buyers seeking a traditional watch form or weeks between charges should look elsewhere.
Pros:- ECG combines with heart-rate alerts, sleep tracking, and Vitals for a wide health-tracking toolkit.
- Fall and crash detection can connect with emergency services and notify contacts.
- Always-on display and fast charging support convenient everyday use.
- Water resistance up to 50 meters suits swimming and general water exposure.
Cons:- Up to 24 hours of normal-use battery life means regular charging.
- GPS connectivity is intended for use with an iPhone or Wi-Fi, limiting its appeal to Android owners.
Best for: iPhone users who want ECG, detailed daily health tracking, and fall or crash detection in one connected smartwatch.
Not ideal for: Android users and people who want several days of battery life or an analog-style watch; this model is iPhone-focused and needs frequent charging.
- Case size:42mm
- Case material and color:Rose gold aluminum
- Band:Light Blush Sport Band, S/M
- Connectivity:GPS; works with iPhone or Wi-Fi
- Display:Always-on
- Health features:ECG, heart-rate alerts, sleep tracking, Vitals app, possible sleep apnea and hypertension notifications
- Water and dust resistance:Up to 50m water resistance; IP6X dust resistance
- Battery and charging:Up to 24 hours of normal use; 15 minutes of charging provides up to 8 hours of normal use
- Safety features:Fall detection, crash detection, emergency services connection, and emergency contact notifications
Our verdict“Choose the Series 11 if you use an iPhone and want ECG plus connected safety features; choose the Withings ScanWatch 2 if battery life and a classic watch design matter more.”
Fitbit Sense Health and Fitness Smartwatch with GPS, Heart Rate, SpO2, ECG, Skin Temperature and Stress Tracking
The Fitbit Sense is a good match for buyers who want ECG in a health-focused watch but would rather charge every few days than every night. Its up to 6+ days of battery life gives it a clear endurance advantage over the Apple Watch Series 11, while built-in GPS and GLONASS let you record routes without carrying your phone. It also tracks SpO2, skin-temperature trends, stress, sleep, and heart rate, making it better suited to broad wellness monitoring than a watch bought chiefly for ECG.
That breadth comes with some dependencies: certain features rely on the Fitbit app, an account, or a paired phone. The listed unit is an international version with no US warranty, a substantial concern for US buyers. It supports both iOS and Android, unlike Apple’s iPhone-focused option, but people who want a conventional watch face should compare it with the analog-style Withings ScanWatch 2.
Pros:- Up to 6+ days of listed battery life reduces charging frequency compared with the Apple Watch Series 11.
- Built-in GPS and GLONASS can track outdoor routes without relying on phone GPS.
- Combines ECG with SpO2, skin-temperature trends, stress, sleep, and heart-rate tracking.
- Compatible with iOS 12.2 or later and Android 7.0 or later.
Cons:- This international version is listed without a US warranty.
- Some features depend on the Fitbit app, an account, or a connected smartphone.
- Its smartwatch design lacks the analog hands and sapphire-glass construction of the Withings ScanWatch 2.
Best for: Android or iPhone users who want ECG, built-in GPS, and several days of health and sleep tracking between charges.
Not ideal for: US buyers who require a domestic warranty, or users who want ECG and health tools with minimal app or account dependence.
- Dimensions:1.59 × 1.59 × 0.49 in
- GPS:Built-in GPS and GLONASS
- Health features:ECG, heart rate, SpO2, skin-temperature trends, stress, and sleep tracking
- Water resistance:Up to 50 meters
- Battery life:Up to 6+ days
- Compatibility:iOS 12.2 or later; Android 7.0 or later
- Syncing range:Up to 30 ft
- Included accessories:Small and large wristbands; charging cable
- Model note:International version; no US warranty
Our verdict“Pick the Fitbit Sense for multi-day, cross-platform health tracking and built-in GPS, but skip this listed version if US warranty coverage is a priority.”
Withings ScanWatch 2 Hybrid Smartwatch
The Withings ScanWatch 2 is the standout choice for someone who wants ECG capability without wearing a screen-forward smartwatch. Its analog hands, stainless steel case, and sapphire glass give it a more traditional appearance than the Fitbit Sense or Apple Watch Series 11, while its 30-second ECG, AFib detection, and heart-rate alerts cover key heart-monitoring needs. It also tracks sleep and more than 40 sports, so the hybrid design does not mean giving up basic activity insights.
Its biggest advantage over the other watches here is up to 35 days of battery life, which makes it far better for people reluctant to charge nightly. The compromise is a less smartwatch-like experience: the small digital display does not offer the same always-on app interaction as Apple’s model. ECG and AFib detection require the Withings ECG App, and some personalized insights are tied to a one-month Withings+ offer.
Pros:- Up to 35 days of battery life is substantially longer than the Apple Watch Series 11 and Fitbit Sense.
- Analog hands, stainless steel, and sapphire glass offer a more conventional watch look.
- Tracks 30-second ECG, AFib detection, continuous heart rate, and heart-rate alerts.
- Supports Android and iOS and tracks more than 40 sports.
Cons:- ECG and AFib detection require the Withings ECG App.
- Some personalized insights are connected to a one-month Withings+ offer.
- The hybrid format offers less screen-based interaction than the Apple Watch Series 11.
Best for: Buyers who want ECG and activity tracking in a traditional analog-style watch, with long battery life and Android or iOS compatibility.
Not ideal for: People who want a large, interactive touchscreen, frequent app use on the wrist, or ECG features that work without a companion app.
- Case:Stainless steel
- Glass:Sapphire
- Battery life:Up to 35 days
- Heart health monitoring:30-second ECG, continuous heart-rate tracking, AFib detection, and high and low heart-rate notifications
- Activity tracking:More than 40 sports, VO₂ max, and heart-rate zones
- Sleep tracking:Sleep stages and breathing
- Compatibility:Android and iOS
- Operating system:HealthSense OS
Our verdict“Choose the ScanWatch 2 if you value a classic watch appearance and long battery life more than a full touchscreen smartwatch experience.”
Samsung Galaxy Watch 8 (2025) 40mm Bluetooth Smartwatch – Graphite
The Galaxy Watch 8 is the Android-focused pick for buyers who care about sleep, blood pressure tracking, and guided running tools in a compact 40mm design. Its lightweight build and personal AI assistant make it a more general-purpose smartwatch than the analog Withings ScanWatch 2, while its Samsung Health features give active users more coaching-oriented tools. The Fitbit Sense is the clearer choice for documented ECG support and built-in GPS; the supplied Galaxy Watch 8 details do not list ECG or GPS, so I would not choose it on the assumption that it provides either.
Blood pressure monitoring also requires a separate cuff, and full functionality depends on Samsung Health. It works with Samsung and other Android phones, but the experience is described as best with Samsung handsets. Buyers seeking confirmed ECG should favor the Apple Watch Series 11, Fitbit Sense, or Withings ScanWatch 2 instead; this model makes more sense for Android health tracking where its listed features are the priority.
Pros:- Compact 40mm size and lightweight design are suited to all-day wear.
- Includes sleep tracking, blood pressure monitoring, and a Running Coach.
- Personal AI assistant adds hands-free help beyond health tracking.
- Compatible with Samsung and other Android smartphones.
Cons:- ECG is not listed in the supplied specifications, making it a poor choice for an ECG-first roundup.
- Blood pressure monitoring requires a separate cuff.
- Full functionality requires Samsung Health, and the experience works best with Samsung phones.
Best for: Android users, especially Samsung phone owners, who prioritize sleep tracking, blood pressure features, and running guidance over confirmed ECG capability.
Not ideal for: Anyone choosing specifically for ECG or built-in GPS; neither feature is listed in the supplied product details, and blood pressure monitoring needs a separate cuff.
- Size:40mm
- Connectivity:Bluetooth
- Compatibility:Samsung and other Android smartphones
- Health features:Sleep tracking, blood pressure monitoring, and heart rate
- Running tools:Running Coach
- AI assistant:Yes
- Battery:Improved long-lasting battery; runtime not specified
- Warranty:2-year warranty
Our verdict“Consider the Galaxy Watch 8 for Android-based sleep and running tools, but choose the Fitbit Sense or Withings ScanWatch 2 if documented ECG is your deciding feature.”
Smart Watch for Men with 120 Sports Modes, 1.83″ HD Display, Alexa Built-in, Heart Rate & Sleep Monitor, IP67 Waterproof, Bluetooth Call & Music Control, Compatible with iPhone/Android
This smartwatch is a budget-style fitness companion for someone who values a large 1.83-inch display, many activity modes, and phone notifications more than clinical-style heart monitoring. It tracks heart rate and sleep, supports Bluetooth calls, and lists 120 sports modes, but the supplied product information does not list ECG. That makes it a weaker fit for an ECG-focused roundup than the Fitbit Sense or Withings ScanWatch 2, both of which explicitly include ECG.
Its broad iPhone and Android compatibility and stated five-to-seven days of active battery life may suit casual exercise and everyday wear. Still, the plastic case and IP67 rating—with water resistance specified to one meter—set limits compared with the Series 11 and its 50-meter rating. I’d choose this only if the screen, sports selection, calls, and basic tracking are the priorities; buyers seeking ECG readings should skip it.
Pros:- Large 1.83-inch HD IPS display with customizable watch faces.
- Lists 120 sports modes for a range of casual activity tracking.
- Supports Bluetooth calls, message reminders, and music and camera controls.
- Listed battery life is five to seven days of active use.
Cons:- ECG is not listed in the supplied product information, unlike the Fitbit Sense and Withings ScanWatch 2.
- Water resistance is specified to one meter, below the Apple Watch Series 11’s 50-meter rating.
- Plastic case and dependence on a compatible smartphone may not suit buyers seeking a more premium or independent smartwatch.
Best for: Casual exercisers who want a large screen, many workout modes, Bluetooth calling, and basic heart-rate and sleep monitoring on iPhone or Android.
Not ideal for: Anyone shopping specifically for ECG, or swimmers who need a watch with a stated 50-meter water-resistance rating.
- Display:1.83-inch HD IPS
- Resolution:240 × 284
- Sports modes:120
- Battery capacity:350mAh
- Battery life:5–7 days active; up to 30 days standby
- Compatibility:iPhone (iOS 9.0+) and Android (5.0+)
- Water resistance:IP67; water resistance depth listed as 1 meter
- Case material:Plastic
- Features:Bluetooth calls, message reminders, heart-rate and sleep monitoring, music and camera control, weather, female cycle tracking, and voice assistant
Our verdict“Buy this for its large display and everyday fitness functions, not for ECG; the Fitbit Sense or Withings ScanWatch 2 is a better match for ECG monitoring.”
Fitbit Sense 2 Health and Fitness Smartwatch – Shadow Grey/Graphite
I’d choose the Fitbit Sense 2 when ECG is part of a broader interest in everyday wellness, especially stress, sleep, and activity patterns. Its ECG app and irregular rhythm notifications sit alongside built-in GPS and more than 40 exercise modes, so it serves as an all-day tracker rather than an ECG-only device. Compared with the Withings ScanWatch 2, this Fitbit offers a more conventional smartwatch experience and a longer list of connected conveniences, while Withings is the stronger fit for buyers who want an analog-style face and much longer battery life.
The Sense 2 is rated for over six days of battery life and is water resistant to 50 meters, though calls and notifications can shorten runtime. Some health features depend on location or a Premium membership, so I wouldn’t pick it for unrestricted access to every metric. The Shadow Grey/Graphite finish keeps this version understated.
Pros:- ECG and irregular rhythm notifications complement stress, sleep, and heart-rate tracking.
- Built-in GPS and more than 40 exercise modes support phone-free route tracking and varied workouts.
- Advertised battery life exceeds six days, longer than many feature-rich smartwatch alternatives.
- 50-meter water resistance suits swimming and everyday wear around water.
Cons:- Some health features are limited by location or require a Fitbit Premium membership.
- Calls and notifications can reduce battery life from the advertised figure.
- Its connected smartwatch format is less suited to buyers who prefer an analog display.
Best for: People who want ECG alongside stress, sleep, and exercise tracking in a connected smartwatch with built-in GPS.
Not ideal for: Buyers who want a traditional analog look, very long battery life, or every health feature without location and subscription limits.
- Color:Shadow Grey/Graphite
- Battery life:6+ days
- Water resistance:50 meters
- GPS:Built-in
- Exercise modes:40+
- Connectivity:Bluetooth
- Smart features:Amazon Alexa, Google Wallet, Google Maps
Our verdict“Choose this Sense 2 if you want ECG as one part of a broad stress-and-fitness toolkit, and skip it if subscription or regional limits are a dealbreaker.”
Fitbit Sense 2 Health and Fitness Smartwatch, Blue Mist/Pale Gold
This Blue Mist/Pale Gold Sense 2 makes the most sense for someone who wants ECG and routine wellness tracking in a lighter, more decorative finish. The underlying health package covers ECG assessment, irregular rhythm notifications, stress, sleep, SpO2, and heart rate, while built-in GPS and 40-plus exercise modes keep it useful for workouts too. Compared with the Withings ScanWatch 2, it has a more app-connected smartwatch feel and a shorter battery-life claim; Withings is better for buyers who prize an analog face and infrequent charging.
Fitbit lists more than six days of battery life and 50-meter water resistance, but access to some health tools varies by country and may require Premium. That makes this version a poor choice for anyone who wants the ECG feature to stand alone without checking compatibility first. The finish, rather than a different health feature set, is its main distinction from the Shadow Grey Sense 2.
Pros:- Combines ECG assessment and irregular rhythm notifications with stress, sleep, and SpO2 tracking.
- Built-in GPS and 40-plus exercise modes support a range of outdoor and indoor activities.
- Rated for more than six days of battery life and water resistant to 50 meters.
- Bluetooth calls and notifications, Alexa, Google Wallet, and Google Maps add connected functions.
Cons:- Health features vary by location, and some require Fitbit Premium.
- The Blue Mist/Pale Gold finish is the main distinction from other Sense 2 versions; the listed core feature set is similar.
- Its smartwatch display and charging needs may not suit buyers seeking a classic analog look and very long runtime.
Best for: Buyers who want Fitbit’s ECG and wellness features in a lighter Blue Mist/Pale Gold style for daily wear.
Not ideal for: People who need guaranteed access to every health feature in their region or want a hybrid analog watch with extended battery life.
- Color:Blue Mist/Pale Gold
- GPS:Built-in
- Exercise modes:40+
- Water resistance:50 meters
- Battery life:6+ days
- Health features:Stress detection, ECG app, irregular rhythm notifications, SpO2, health metrics dashboard
- Connectivity and apps:Bluetooth calls and notifications, Amazon Alexa, Google Wallet, Google Maps
Our verdict“Pick this Sense 2 for Fitbit ECG and wellness tracking in a distinctive lighter finish, provided its regional and membership limits fit your needs.”
Withings ScanWatch 2 Hybrid Smartwatch, 38 mm
For ECG buyers who don’t want a screen-forward smartwatch, I’d put the Withings ScanWatch 2 ahead of the Fitbit Sense 2. Its analog display and stainless steel case give it a traditional watch appearance, while the ECG, heart-rate, sleep, and activity tracking handle core health monitoring. The biggest practical difference is its up-to-35-day battery life, which cuts down on charging compared with the Fitbit’s 6-plus-day rating. Built-in GPS and tracking for more than 40 sports add exercise coverage, though the compact digital display is better for quick checks than for reading detailed information.
The 38 mm case, sapphire glass, and 100-meter water resistance make this a more watch-like, durable choice. I’d skip it if you want a large interactive screen or ample onboard storage: its digital display is just 0.63 inches and storage is limited to 1 MB. It favors discreet health tracking over smartwatch-style convenience.
Pros:- Up to 35 days of battery life substantially outlasts the Fitbit Sense 2’s advertised runtime.
- ECG, heart-rate, sleep, and activity tracking are integrated into an analog-style design.
- Stainless steel case and sapphire glass provide durable materials.
- Built-in GPS, more than 40 sports modes, and 100-meter water resistance broaden its everyday and exercise use.
Cons:- The 0.63-inch digital display is small for reading detailed data or interacting with smartwatch features.
- Listed storage is limited to 1 MB.
- Its hybrid design offers a less screen-centered smartwatch experience than the Fitbit Sense 2.
Best for: People who want ECG and activity tracking in a compact analog-style watch and prefer charging far less often.
Not ideal for: Buyers who want a large touchscreen for apps and notifications, or substantial onboard storage for smartwatch functions.
- Case size:38 mm
- Case material:Stainless steel
- Glass:Sapphire
- Display:0.63-inch digital display, 320 x 386 resolution
- Battery life:Up to 35 days
- Water resistance:100 meters; IPX8
- Navigation:Built-in GPS
- Health sensors:ECG, optical heart rate, accelerometer, GPS, temperature sensor
- Compatibility:Android and iOS
Our verdict“Choose the ScanWatch 2 if discreet ECG tracking and long battery life matter more than a large, app-rich display.”
Samsung Galaxy Watch 4 40mm Bluetooth Smartwatch with ECG, GPS, and Fall Detection – US Version, Black
The Samsung Galaxy Watch 4 is the most fitness- and app-oriented pick in this group for Samsung phone owners who want ECG alongside deeper workout data. It adds SpO2 and body composition analysis, plus auto workout tracking, VO₂ max, and run coaching—more exercise detail than the Withings ScanWatch 2, whose strengths are its analog styling and up-to-35-day battery life. The 40 mm format keeps this version compact, while GPS and the listed LTE connectivity support connected use beyond basic watch functions.
That broader feature set brings a real limitation: some health tools require a compatible Samsung phone and specific app versions. The number of fitness and connected options may also be more than a casual user wants. I’d choose it over the Fitbit Sense 2 for Samsung-centered app integration and advanced workout metrics, but not for buyers who value simple wellness tracking or unusually long battery life.
Pros:- ECG is joined by SpO2, heart-rate monitoring, and body composition analysis.
- Auto workout detection, VO₂ max tracking, and run coaching offer detailed fitness tools.
- The 40 mm case provides a compact option with GPS.
- Listed LTE connectivity supports calls, texts, and music streaming away from a phone.
Cons:- Some health features require a compatible Samsung phone and specific app versions.
- Its many fitness and connected functions may feel excessive to casual users.
- It lacks the exceptionally long battery-life claim of the Withings ScanWatch 2.
Best for: Samsung phone owners who want ECG, body composition data, and advanced running tools in a compact smartwatch.
Not ideal for: Casual users who want a simpler health watch, or buyers without a compatible Samsung phone for supported health features.
- Display size:40 mm
- Model:SM-R860NZKAXAA
- Connectivity:Bluetooth, LTE, GPS
- Health sensors:ECG, heart-rate monitor, SpO2, body composition (BIA)
- Fitness features:Auto workout tracking, VO₂ max, advanced run coaching, group challenges
- Fall detection:Included
Our verdict“Choose the Galaxy Watch 4 if you use a compatible Samsung phone and want ECG paired with advanced fitness data, not a minimalist health watch.”
Fitbit Sense 2 Health and Fitness Smartwatch, Lunar White/Platinum
The Lunar White/Platinum Fitbit Sense 2 is a straightforward choice for buyers who want ECG in a connected wellness watch and prefer a pale finish. Its ECG app and irregular heart rhythm notifications share space with stress, sleep, SpO2, and heart-rate tracking, plus built-in GPS and over 40 exercise modes. Compared with the Samsung Galaxy Watch 4, this Fitbit emphasizes everyday health routines and a battery rating above six days rather than body composition analysis and advanced running metrics. Compared with the Withings ScanWatch 2, it offers a more conventional smartwatch experience but needs charging more often.
Water resistance to 50 meters makes it practical for regular activity, yet some features depend on region, device, age, or a Fitbit Premium membership, and some functions need a nearby phone. This color version does not add a distinct ECG capability over other Sense 2 finishes, so I’d select it for appearance, not a different health package.
Pros:- ECG and irregular heart rhythm notifications accompany stress, sleep, SpO2, and heart-rate tracking.
- Built-in GPS and more than 40 exercise modes support varied workouts.
- Battery is rated for over six days, and water resistance extends to 50 meters.
- Alexa, Google Wallet, Google Maps, and Bluetooth notifications provide connected features.
Cons:- Some health features are limited by country, device, or age, and some require Fitbit Premium.
- Some functions need a nearby phone.
- Its light finish does not change the core ECG feature set compared with other Sense 2 colors.
Best for: Buyers who want Fitbit’s ECG, stress, and sleep tracking in a light-colored smartwatch for daily fitness and notifications.
Not ideal for: People who need all health functions available without regional, age, phone, or membership restrictions, or who want a hybrid analog design.
- Color:Lunar White/Platinum
- GPS:Built-in
- Water resistance:Up to 50 meters
- Battery life:6+ days
- Exercise modes:40+
- Health features:Stress monitoring, ECG app, irregular heart rhythm notifications, SpO2, heart-rate tracking
- Connectivity and apps:Bluetooth calls and notifications, Amazon Alexa, Google Wallet, Google Maps
Our verdict“Pick this Sense 2 if its pale finish appeals and you want ECG within Fitbit’s broader wellness toolkit, but check feature availability before buying.”
KardiaMobile 6L EKG, No Membership Required, Unlimited Recordings, HSA/FSA
Unlike the Apple Watch Series 11, the KardiaMobile 6L is a stand-alone handheld ECG device, not a watch, so it cannot provide continuous wrist-based health or fitness tracking. Its advantage is a six-lead recording, which captures more electrical viewpoints than the watch-based ECG options in this roundup. Results are available in about 30 seconds, with analysis for AFib, bradycardia, tachycardia, and normal sinus rhythm; recordings can also be shared with a healthcare provider. Basic use requires the Kardia app, but the listing says no membership is needed for basic functionality. The tradeoff is portability by routine: you must have the device and a compatible phone ready when you want a reading. It is not recommended for people with pacemakers or ICDs, and it does not check for heart attacks.
Pros:- Six-lead ECG provides more electrical viewpoints than the watch-based ECG options in this roundup.
- Returns rhythm analysis in about 30 seconds.
- Screens for AFib, bradycardia, tachycardia, and normal sinus rhythm.
- Basic functionality requires no membership and works with most smartphones and tablets.
Cons:- It is a handheld ECG device, not a smartwatch or continuous health tracker.
- Requires the Kardia app and a compatible smartphone or tablet.
- Not recommended for use with pacemakers or ICDs and does not check for heart attacks.
Best for: People who want an on-demand, six-lead ECG to share with a healthcare provider and do not need smartwatch features.
Not ideal for: Buyers seeking a wearable that tracks heart activity, workouts, and notifications throughout the day, or people with a pacemaker or ICD.
- ECG leads:6
- FDA-cleared:Yes
- Arrhythmias detected:4: AFib, bradycardia, tachycardia, and normal sinus rhythm
- Results time:About 30 seconds
- Compatibility:Most smartphones and tablets
- Basic functionality:No membership required
- Model number:AC-019
Our verdict“Choose the KardiaMobile 6L if you want quick, on-demand six-lead ECG recordings rather than the all-day tracking offered by the Apple Watch Series 11.”
Apple Watch Series 11 GPS Smartwatch, 46mm Jet Black Aluminum Case with Black Sport Band (M/L)
The Apple Watch Series 11 suits buyers who want ECG as one part of a broader wrist-based health and fitness toolkit. It pairs ECG with heart-rate alerts, sleep scoring, workout metrics, and safety features such as fall and severe car crash detection. Compared with the KardiaMobile 6L, it is more convenient for everyday wear and activity tracking, while the Kardia device provides a dedicated six-lead ECG; the Series 11 listing does not specify a lead count. Its always-on display and water resistance up to 50 meters also make it a stronger fit for frequent workouts and daily use than a handheld ECG. The compromises are a stated battery life of up to 24 hours, dependence on an iPhone or Wi-Fi for connectivity, and health and safety features that may depend on availability and setup.
Pros:- Combines ECG with heart-rate alerts, sleep scoring, and workout metrics.
- Fall and severe car crash detection can support emergency assistance.
- Water resistance up to 50 meters and IP6X dust resistance suit active daily wear.
- Fast charging provides up to eight hours of normal use after 15 minutes.
Cons:- Requires an iPhone or Wi-Fi for connectivity.
- Up to 24 hours of normal use means regular charging.
- Some health and safety features depend on availability and setup.
Best for: iPhone owners who want ECG alongside workouts, sleep tracking, heart-rate alerts, and wrist-based safety features.
Not ideal for: Android users, buyers who want a dedicated six-lead ECG device, or anyone prioritizing multi-day use without frequent charging.
- Model:Apple Watch Series 11
- Connectivity:GPS
- Case size and material:46mm jet black aluminum
- Band:Black Sport Band, M/L
- Battery life:Up to 24 hours of normal use
- Fast charging:15 minutes for up to 8 hours of normal use
- Water resistance:Up to 50 meters
- Dust resistance:IP6X
- Display:Always-on display with scratch-resistant glass
Our verdict“Pick the Series 11 if you use an iPhone and want ECG in a full-featured everyday smartwatch, rather than the KardiaMobile 6L’s dedicated six-lead readings.”
How We Picked
I ranked these options by how well they match the specific job implied by watches with ECG: recording an ECG is the starting point, not the whole decision. I weighed phone compatibility, ease of starting and reviewing a recording, the usefulness of the broader health and smartwatch features, wearing style, and the tradeoffs buyers face around size and daily charging habits. I also separated wrist-worn watches from the KardiaMobile 6L, since it offers a different kind of ECG workflow rather than watch functions.
The order favors devices with a strong balance of ECG access and everyday usefulness, while giving distinct designs and buyer needs their own place. Apple Watch Series 11 ranks first for iPhone users seeking a capable all-rounder; ScanWatch 2 stands out for its hybrid format, and Fitbit Sense 2 offers a wellness-oriented alternative. Samsung options make more sense for compatible Android users, while older or less-established choices rank lower when the product information gives buyers less confidence about the overall experience. ECG availability and features can vary by region, phone, and software, so I treat compatibility as a buying check rather than assuming every feature works for everyone.
| watches with ecg | Compatibility |
|---|---|
| Apple Watch Series 11 GPS 42mm | — |
| Fitbit Sense Health and Fitnes | iOS 12.2 or later; Android 7.0 or later |
| Withings ScanWatch 2 Hybrid Sm | Android and iOS |
| Samsung Galaxy Watch 8 | Samsung and other Android smartphones |
| Smart Watch for Men with 120 S | iPhone (iOS 9.0+) and Android (5.0+) |
| Fitbit Sense 2 Health and Fitn | — |
| Fitbit Sense 2 Health and Fitn | — |
| Withings ScanWatch 2 Hybrid Sm | Android and iOS |
| Samsung Galaxy Watch 4 40mm Bl | — |
| Fitbit Sense 2 Health and Fitn | — |
| KardiaMobile 6L EKG | Most smartphones and tablets |
| Apple Watch Series 11 GPS Smar | — |
Factors to Consider When Choosing Watches With Ecg
Before choosing, I’d decide how you plan to use ECG readings and how much smartwatch you want around that function. These broader checks can prevent a common mismatch: buying a device for a health feature that is unavailable with your phone or expecting a wearable ECG to replace clinical care.
Check Phone and Regional Compatibility First
ECG functions may depend on a supported phone, app, account setup, and local availability, not just the watch hardware. Confirm the exact watch-and-phone pairing requirements before buying, especially if you use Android and are considering an Apple Watch or an iPhone and are considering a Samsung model. A watch can still offer timekeeping or some fitness features while its ECG function remains unavailable to you. Also check whether setup requires a particular operating-system version or a manufacturer account. This compatibility check matters more than choosing between two case colors or a small difference in screen size.
Know What a Wearable ECG Can and Cannot Tell You
A watch ECG is a spot recording, not continuous heart monitoring, and it does not diagnose every heart condition. Read the manufacturer’s description of the rhythm categories it can identify and the limits it places on interpretation. Do not treat an inconclusive or normal result as proof that symptoms are harmless; contact a clinician when symptoms concern you. If you need a particular kind of recording for a care plan, ask your healthcare professional whether a wrist device or a dedicated recorder is appropriate. This is one reason the KardiaMobile 6L should be compared as a separate tool, not as a smartwatch substitute.
Choose a Recording Workflow You Will Actually Use
Think through what happens after you start an ECG: how you hold your arm, where the result appears, and whether you can share or export it when needed. A feature that takes several steps to access may be less useful than a simpler workflow, even if both devices list ECG capability. Check whether recordings live in a phone app, on the watch, or across both, and whether the app presents explanations in language you can understand. Consider who may need to see a recording and whether the sharing process fits your routine. I would prioritize a familiar, repeatable process over a longer list of health metrics.
Balance Screen Style Against Battery and Charging Habits
Full-display smartwatches offer more room for apps, notifications, and on-watch controls, but many buyers prefer not to add another screen to their day. Hybrid designs such as ScanWatch 2 use a more traditional watch appearance, which can be a better fit for dressier settings or people who favor glanceable information. Check the maker’s battery guidance for the exact model and feature use you expect; GPS, frequent notifications, and health tracking can affect charging routines. Ask yourself whether you will wear the watch overnight, since charging schedules can interfere with sleep tracking. A design you find comfortable and easy to keep charged is more likely to become part of your regular routine.
Treat Case Size as a Comfort Decision
Small differences in case diameter can change how a watch sits, how easy its controls are to use, and whether it feels comfortable during sleep. The 40mm Samsung and 42mm Apple options may appeal to buyers who want a more compact fit, while the 46mm Apple model offers a larger display. Case size alone does not tell the whole story: band fit, case thickness, and the shape of your wrist also affect comfort. If possible, compare actual dimensions and band sizing rather than relying on a product photo. Do not choose a larger model only for its screen if it makes overnight wear less appealing.
Pay for the Features You Will Use, Not a Longer Spec List
ECG is only one part of the ownership decision, so make a short list of the other functions you expect to use regularly, such as notifications, GPS, sleep tracking, or stress-related tools. A broad feature list has little value if the functions depend on a subscription, are unavailable in your region, or do not fit your habits. Check app requirements and any ongoing service costs before deciding, without assuming every health feature is included in the same way across brands. If ECG is your sole priority, a dedicated recorder may suit you better than paying for a full smartwatch experience. If you also want daily smartwatch functions, judge the added features by whether they solve a real need.
Frequently Asked Questions
Can I use an ECG watch without a compatible smartphone?
Usually, you should not assume that ECG setup and result review will work fully without a compatible phone. Some watch functions may operate on the wrist, but an app or supported phone may be needed to configure ECG, store readings, or share them. Check the exact model’s compatibility requirements for your phone and operating system before purchase. This is especially relevant when comparing Apple and Samsung watches across phone brands. If you need recordings available without relying on a particular phone, ask the manufacturer or your clinician about the workflow first.
Is the KardiaMobile 6L a good substitute for an ECG watch?
It can be a useful alternative if your priority is taking a dedicated EKG recording rather than wearing a smartwatch all day. It does not replace watch features such as wrist notifications, activity tracking, or a watch display, so the comparison depends on your intended use. Consider how often you expect to record and whether carrying a separate device fits your routine. Ask your healthcare professional whether its recording format is suitable for the information they need. It is best evaluated as a separate ECG tool, not as another watch on the same shortlist.
Should I choose an Apple Watch or a Samsung Galaxy Watch for ECG?
Start with the phone you already use, because compatibility can determine whether ECG and related app features are available. Apple Watch models are the more natural match for iPhone owners, while Galaxy Watch models are generally aimed at Android users and may have specific phone requirements. Then compare size, interface, and the rest of the smartwatch experience rather than choosing on ECG alone. A feature label does not guarantee identical setup or availability across regions and devices. Verify current support for your exact phone and location before deciding.
Do I need a full smartwatch if ECG is my main reason for buying?
Not necessarily: a full smartwatch makes more sense if you also want notifications, fitness tracking, apps, or other wrist-based tools. If you mainly need occasional recordings, a hybrid watch or a dedicated ECG device may fit your routine better. Think about whether you want a bright touchscreen and frequent charging, or a more traditional design with a less screen-focused experience. Also compare how each option stores and shares readings, since the follow-up workflow may matter more than extra smartwatch features. Ask a clinician before choosing a device for a specific medical monitoring need.
Can I use an ECG watch to diagnose a heart problem or replace medical care?
No. A consumer wearable ECG can record limited information and may flag certain patterns, but it is not a substitute for a medical diagnosis or a full clinical ECG. Results can be inconclusive, and a reassuring result does not rule out every heart problem. If you have symptoms such as chest pain, fainting, or severe shortness of breath, seek urgent medical care rather than relying on a watch reading. For ongoing symptoms or questions about a reading, contact a healthcare professional and follow their advice. Use the device as a source of information to discuss, not as the final authority.
Conclusion
My best overall pick is the Apple Watch Series 11 for iPhone users who want ECG alongside a full smartwatch; choose the 42mm or 46mm version based on fit and display preference. For best value, I’d look at the Galaxy Watch 4 if its phone compatibility and feature set meet your needs, while recognizing it is an older model. The best premium-style alternative for buyers who favor a traditional watch appearance is the Withings ScanWatch 2. For beginners, Fitbit Sense 2 is a straightforward wellness-focused option to compare, provided its app and phone requirements suit you. If your specific need is a portable recording device rather than a watch, consider the KardiaMobile 6L; whatever you choose, confirm ECG availability in your region and discuss medical concerns with a clinician.
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