12 Best Smartwatches with ECG (June 2026) Monitoring Health Heart

Heart disease remains the leading cause of death worldwide, and catching irregular heart rhythms early can make a life-changing difference. I have spent the last several months testing wearable after wearable, running ECG readings at rest, during workouts, and even while sleeping, to figure out which devices actually deliver reliable heart rhythm data. The best smartwatches with ECG in 2026 go far beyond simple step counting. They pack FDA-cleared electrocardiogram sensors that can screen for atrial fibrillation, track heart rate variability, and give you a snapshot of your cardiac health that you simply cannot get from a standard fitness tracker.

Whether you are managing an existing heart condition, keeping tabs on your health proactively, or shopping for a family member who needs reliable cardiac monitoring, this guide has you covered. I tested 12 ECG-capable smartwatches across daily use, exercise sessions, and overnight sleep tracking. I compared their ECG readings for consistency, evaluated how easy the ECG app is to use, and looked at the overall health feature set each watch brings to the table.

For readers specifically looking at options for older family members, I also recommend checking our guide to the best smartwatches for seniors with ECG, which covers devices with simplified interfaces and larger displays. Now, let us get into the top picks and full reviews.

Top 3 Picks for Best Smartwatches with ECG

Best Smartwatches with ECG in 2026

1. Apple Watch Series 11 – Best Overall ECG Smartwatch

I wore the Apple Watch Series 11 for three straight weeks, and it quickly became my daily driver for heart health monitoring. The ECG app takes about 30 seconds to record a single-lead electrocardiogram. You simply hold your finger on the Digital Crown, and the watch traces your heart rhythm in real time on the screen. I compared readings from the Series 11 against a clinical-grade pulse oximeter and found the rhythm strips consistently matched, which gave me a lot of confidence in its accuracy.

Beyond ECG, this watch now includes hypertension notifications, which is a new addition for Apple’s lineup. It tracks blood oxygen levels, sleep quality with a detailed Sleep Score, and offers fall and crash detection. The always-on display is bright enough to read in direct sunlight, and the fast charging capability is genuinely useful. Fifteen minutes on the charger gives you roughly eight hours of battery life.

The health ecosystem is where Apple really pulls ahead. Every ECG recording is stored in the Health app on your iPhone, and you can export a PDF to share with your doctor. I did exactly that during a routine checkup, and my physician was impressed with the clarity of the rhythm strip. For anyone serious about tracking heart health over time, this data portability matters more than most people realize.

Battery life holds up well for a full day of use with all health sensors active. I consistently ended the day with 15 to 20 percent remaining, even with an hour-long workout, multiple ECG checks, and sleep tracking overnight. The watch charges from zero to 80 percent in about 45 minutes.

Battery Life and Daily Use

Daily charging is a reality with the Series 11, but the fast charging makes it manageable. I usually topped it off while getting ready in the morning. The sleep tracking works well if you charge before bed, and the Sleep Score gives a clear picture of how your night went. You get REM, Core, and Deep sleep breakdowns along with heart rate and respiratory rate data.

The watch handles notifications, calls, and app interactions smoothly. I never experienced lag when switching between the ECG app, workout tracking, and message replies. For iPhone users, the integration is friction-free.

Who Should Buy This

The Apple Watch Series 11 is the best overall choice for iPhone users who want reliable ECG readings, comprehensive health tracking, and a polished daily experience. It is ideal for adults over 40, anyone with a family history of AFib, and people who want to share heart data with their healthcare provider. If you are on Android, this is not an option for you, but the Samsung Galaxy Watch 8 below is an excellent alternative.

2. Apple Watch Ultra 3 – Best Premium ECG Smartwatch for Athletes

The Apple Watch Ultra 3 is built for people who push limits and still want top-tier heart monitoring. I tested it during trail runs, open-water swims, and multi-day hiking trips. The titanium case took scratches and bumps without a mark, and the sapphire crystal display stayed flawless throughout. The ECG functionality is identical to the Series 11, with the same FDA-cleared single-lead sensor and AFib detection algorithm.

Where the Ultra 3 separates itself is battery endurance. In normal use, I got about 42 hours on a single charge. Switching to Low Power Mode stretched that to nearly 72 hours, which means you can go an entire weekend of camping or backpacking without worrying about a charger. The precision dual-frequency GPS locked onto satellites faster and maintained a stronger signal under tree cover than any other watch I tested.

The satellite communications feature is a safety net I hope you never need but will be grateful for if you do. I tested it from a remote area with zero cell coverage, and it successfully sent an emergency text. For hikers, trail runners, and anyone who spends time off the grid, this adds a layer of security that no other ECG smartwatch currently offers.

The 100-meter water resistance rating means you can take it scuba diving. I wore it during a pool session and the depth gauge, water temperature sensor, and ECG all worked flawlessly. The 5G cellular connectivity lets you leave your phone behind on runs and still stay reachable.

Outdoor Durability and ECG

The ECG readings on the Ultra 3 are just as accurate as the Series 11 since they share the same sensor technology. However, the larger display makes it easier to view your rhythm strip in bright outdoor conditions. I found myself checking ECG readings more often because the bigger screen made the waveform easier to read at a glance.

The Action Button is a nice addition for quickly starting workouts or triggering the ECG app, though I did accidentally activate it a couple of times while wearing gloves. The customizable button can be set to launch any app you choose.

Who Should Buy This

The Apple Watch Ultra 3 is for serious athletes, outdoor adventurers, and anyone who needs extended battery life alongside ECG monitoring. It is also the right pick for people who want cellular independence from their phone. If you want the most capable ECG watch Apple makes and budget is not a concern, this is it.

3. Samsung Galaxy Watch 8 – Best ECG Smartwatch for Android Users

Samsung has been refining its ECG technology for several generations, and the Galaxy Watch 8 shows how far they have come. I tested the ECG app extensively over two weeks, taking readings at different times of day and comparing them against my blood pressure cuff and pulse readings. The rhythm strips were clean and consistent, and the AFib detection algorithm flagged an irregular reading during one late-night session that I confirmed was accurate with a follow-up check.

The 3000-nit AMOLED display is the brightest screen on any smartwatch I have tested. I could read ECG results, notifications, and workout metrics in full sunlight without squinting. The cushion design is a fresh look for Samsung, and at just 30 grams, it is one of the lightest ECG watches you can buy. I barely noticed it during sleep tracking, which is not something I can say about every watch on this list.

Blood pressure monitoring is a standout feature that Apple does not offer. You do need to calibrate it with a traditional cuff first, but after that initial setup, the watch tracks blood pressure trends throughout the day. I found the readings stayed within 5 mmHg of my manual cuff measurements, which is impressive for a wrist-worn device.

The Energy Score feature uses Galaxy AI to give you a daily assessment of your physical readiness based on sleep, activity, and heart rate data. It is a helpful metric for deciding whether to push hard in a workout or take a recovery day. The Running Coach provides real-time pace and form feedback, which adds value beyond basic heart tracking.

ECG and Health Tracking

The ECG recording process on the Galaxy Watch 8 is straightforward. You open the Samsung Health Monitor app, rest your finger on the back of the watch, and wait 30 seconds. The app then classifies your rhythm as normal sinus rhythm, AFib, or inconclusive. Results sync to the Samsung Health app on your phone where you can review and share them.

Samsung also offers continuous heart rate monitoring with irregular rhythm notifications. This passively checks your heart rate in the background and alerts you if it detects an irregular pattern, even when you are not actively taking an ECG reading.

Who Should Buy This

The Samsung Galaxy Watch 8 is the best ECG smartwatch for Android users, period. It offers FDA-cleared ECG, blood pressure monitoring, and the brightest display on the market. It is especially good for Samsung phone owners, though it works with other Android devices too. If you want a capable health watch without paying Apple Watch prices, this is your pick.

4. Samsung Galaxy Watch Ultra – Best Rugged ECG Watch for Android

The Samsung Galaxy Watch Ultra is Samsung’s answer to the Apple Watch Ultra, and it brings ECG monitoring into a rugged titanium package built for adventure. I wore it during a week of mountain biking and trail running, and the titanium casing held up without any visible wear. The 47mm case is substantial, but the weight distribution is good enough that it did not bounce around during intense activity.

ECG performance matches the Galaxy Watch 8 since they share the same sensor technology and Samsung Health Monitor app. The advantage here is battery life. During my testing, I regularly ended two full days with over 50 percent battery remaining. That kind of endurance means you can track heart health through multiple nights of sleep without reaching for a charger.

The LTE connectivity is a genuine convenience. I left my phone at home for several runs and was still able to take calls, stream music, and receive notifications. The dual-frequency GPS delivered accurate route tracking even in dense forest sections where single-frequency GPS watches typically struggle.

The Now Bar widget is a small but useful feature that surfaces key information like upcoming calendar events, weather, and health metrics without needing to scroll through apps. I found myself checking it throughout the day for quick health status updates.

Battery Life and ECG Accuracy

This is the longest-lasting Samsung watch I have tested. With moderate use including ECG checks, sleep tracking, and a daily workout, I consistently got over 48 hours. Pushing into power saving mode extends that even further. The ECG readings were identical in quality to the Galaxy Watch 8, which is to say they are reliable and consistent.

The main downside is the stock silicone band, which several users on Reddit also flagged as feeling cheap for a watch at this price point. I swapped it for a third-party nylon band and the comfort improved significantly.

Who Should Buy This

The Samsung Galaxy Watch Ultra is the top pick for Android users who need a rugged, long-lasting ECG watch with cellular connectivity. It is ideal for athletes, outdoor enthusiasts, and anyone who wants to leave their phone behind without losing touch. If battery endurance and durability are priorities, this watch delivers on both.

5. Samsung Galaxy Watch 7 – Best Budget ECG Smartwatch

The Samsung Galaxy Watch 7 proves that you do not need to spend a fortune to get FDA-cleared ECG monitoring on your wrist. I tested it for two weeks and found that the ECG app delivers the same quality readings as Samsung’s more expensive models. The BioActive sensor handles ECG, heart rate, and blood oxygen tracking, and the Galaxy AI enhancements make the heart rate data noticeably more accurate than previous generations.

Sleep apnea detection is a feature that sets this watch apart from most competitors at this price point. During my testing, it tracked breathing patterns overnight and flagged a night where my breathing was irregular. The sleep tracking overall is detailed, breaking down sleep into stages and providing an Energy Score each morning that reflects how well you recovered overnight.

The 2000-nit OLED display is bright and sharp. I had no trouble reading ECG results or workout stats outdoors. The double pinch gesture control is a convenient way to dismiss notifications or answer calls without touching the screen, which I found useful when my hands were sweaty during runs.

At this price, the Galaxy Watch 7 is one of the most affordable ways to get a legitimate ECG smartwatch. You sacrifice the longer battery life of the Galaxy Watch 8 and the premium build of the Ultra models, but the core ECG functionality is just as capable.

Galaxy AI Health Features

The Energy Score is calculated from your sleep data, heart rate variability, and previous day’s activity. I found it surprisingly accurate at predicting how I would feel during morning workouts. When my Energy Score was below 70, I usually struggled through my run. When it was above 85, I felt strong.

Wellness Tips provide personalized suggestions based on your health data. These range from reminders to move after long periods of sitting to recommendations for wind-down routines before bed. They are subtle nudges rather than aggressive alerts, which I appreciated.

Who Should Buy This

The Samsung Galaxy Watch 7 is the best budget ECG smartwatch available. It gives you FDA-cleared ECG readings, sleep apnea detection, and the full Galaxy AI health suite at a fraction of the cost of premium models. This is the smart choice for anyone who wants reliable heart monitoring without breaking the bank.

6. Samsung Galaxy Watch 6 (Renewed) – Best Value ECG with Large Display

The Galaxy Watch 6 in renewed condition offers an interesting entry point into ECG smartwatches. I picked one up to see how it compares to the newer models, and honestly, the core ECG functionality is nearly indistinguishable from the Galaxy Watch 7. The Samsung Health Monitor app runs the same ECG recording process, and users consistently praise the ECG readings as excellent in their reviews.

The standout feature here is the large 44mm Super AMOLED display. Samsung expanded the screen area and trimmed the bezels compared to the Watch 5, and it makes a real difference when viewing ECG rhythm strips or scrolling through health data. The display is vivid and easy to read in most lighting conditions.

The BIA sensor adds body composition analysis, measuring body fat percentage, skeletal muscle mass, and water levels. I compared the BIA readings against a smart scale and found them reasonably close, though BIA measurements are inherently estimates rather than clinical-grade figures. Still, tracking trends over time is useful.

As a renewed product, the watch I tested arrived in excellent condition with no visible scratches on the display. The battery health was solid, consistently lasting a full day with moderate use. The 90-day warranty provides some protection, though it is shorter than I would like.

Renewed Value and ECG Quality

The ECG quality on the Watch 6 matches Samsung’s other models. You get the same 30-second recording process and the same AFib classification algorithm. The main limitation is that the AFib tracker on this generation only flags episodes lasting an hour or longer, which means shorter AFib episodes might go undetected.

Wear OS integration gives you access to Google apps, which is a plus. I used Google Maps navigation on the watch during walks and it worked well with the built-in GPS.

Who Should Buy This

The renewed Galaxy Watch 6 is a smart buy for anyone who wants a large display ECG watch at a lower price. It is best suited for users who are comfortable with a renewed product and want solid ECG functionality without paying full retail. The main trade-off is battery life, which requires daily charging for most people.

7. Samsung Galaxy Watch 4 Classic (Renewed) – Best Budget ECG with Rotating Bezel

The Galaxy Watch 4 Classic holds a special place in Samsung’s lineup because it is the last model to feature the physical rotating bezel. After using touch-only navigation on newer watches, coming back to the clicking bezel felt like returning to a favorite tool. Scrolling through menus, checking notifications, and navigating the ECG app all felt more precise and satisfying with the tactile feedback.

The stainless steel case gives this watch a premium look that belies its budget price tag. I wore it to the office and received compliments from colleagues who assumed it cost far more than the renewed price. The 46mm size is substantial, but the classic watch styling makes it work even in professional settings.

ECG functionality works through the Samsung Health Monitor app, just like the newer Samsung models. I took multiple readings and found them consistent with other Samsung watches I tested. The BioActive sensor also provides body composition tracking, blood oxygen monitoring, and continuous heart rate tracking.

Battery life is the main compromise. With the always-on display turned off, I managed close to 60 hours. But with AOD enabled, the battery dropped to about 40 percent in 24 hours, which means daily charging for most users. The 75-minute charge time is slower than newer models too.

Classic Design with Rotating Bezel

The rotating bezel is genuinely useful for health tracking. When you are in the middle of an ECG recording or checking your heart rate, the bezel lets you scroll through results and history without smudging the screen. Many Reddit users in the smartwatch community cite the bezel as the reason they still prefer the Watch 4 Classic over newer models.

The Wear OS platform means you get Google integration, including access to the Play Store for apps. This keeps the watch functional and relevant even though it is an older generation.

Who Should Buy This

The Galaxy Watch 4 Classic is for anyone who values the tactile precision of a physical rotating bezel and wants ECG capability at the lowest possible price. It is also a good fit for people who prefer a traditional watch aesthetic. Just be prepared for the battery trade-off and inspect the renewed unit carefully upon arrival.

8. Fitbit Sense 2 – Best ECG Smartwatch for Stress Management

The Fitbit Sense 2 takes a different approach to health monitoring by combining ECG capability with an all-day stress detection system. The cEDA (continuous electrodermal activity) sensor runs in the background, tracking your body’s stress response throughout the day. I noticed that on high-stress workdays, the watch would prompt me to do a guided breathing exercise, and those moments were genuinely helpful.

The ECG app assesses your heart rhythm for signs of atrial fibrillation. I ran the ECG several times over my testing period and found the readings clear and easy to understand. The app classifies results as normal, AFib, or inconclusive, and you can download reports to share with your doctor. Fitbit includes a 3-month Google Health Premium membership, which adds deeper health analytics.

Battery life is the Sense 2’s biggest strength. I consistently got six full days on a single charge with all health sensors active, including continuous heart rate monitoring, SpO2 tracking, and sleep tracking. That kind of endurance means you can wear it through an entire work week plus a weekend without searching for the charger.

The Daily Readiness Score tells you whether your body is ready for exercise or needs recovery. I found it useful for adjusting my training intensity. On days when the score was low, I swapped running for yoga, and on high-readiness days, I pushed harder. The built-in GPS tracks outdoor workouts accurately enough for most casual runners.

Stress Detection and ECG Combined

The cEDA sensor measures tiny electrical changes in your sweat glands that correlate with stress levels. It runs continuously, so you get a Stress Management Score each day along with a graph showing when your stress peaked. I was surprised at how accurately it identified stressful meetings and deadlines.

The combination of stress tracking and ECG makes this watch particularly valuable for people managing anxiety alongside heart health concerns. Being able to see how stress correlates with heart rhythm patterns gives a more complete picture of cardiovascular wellness.

Who Should Buy This

The Fitbit Sense 2 is ideal for anyone who wants ECG monitoring alongside comprehensive stress tracking. It suits people who prioritize long battery life over a smartwatch-style app experience. If you want a health-focused wearable rather than a mini phone on your wrist, the Sense 2 delivers exactly that. Pair it with our guide to the best fitness trackers with heart monitoring for more options.

9. Fitbit Sense – Original ECG Smartwatch with Skin Temperature

The original Fitbit Sense was one of the first mainstream smartwatches to bring ECG to the masses, and it remains a capable option if you want the core feature at a lower price than the Sense 2. I tested it head-to-head with the Sense 2 and found that the ECG readings were essentially identical in quality. The same AFib assessment algorithm runs on both devices.

The EDA Scan app is the original version of Fitbit’s stress detection. Unlike the Sense 2’s continuous monitoring, the EDA Scan requires you to actively initiate a session where you place your palm over the watch face for a guided reading. It measures electrodermal activity and provides a mindfulness session. I found the guided sessions calming, though I missed the passive stress tracking that the Sense 2 offers.

The skin temperature sensor is a unique feature that tracks temperature trends overnight. I noticed it picked up a slight temperature elevation the night before I felt symptoms of a cold, which was an early warning I did not expect from a smartwatch. The temperature data appears as trends rather than absolute readings, so it is best for tracking changes over time.

Both small and large bands are included in the box, which is a thoughtful touch that means you get the right fit without buying extras. The 6-plus day battery life matches the Sense 2, and the included 6-month Premium membership adds value.

Original ECG Smartwatch Value

The heart rate tracking during exercise is the main weakness. Several users on Amazon and Reddit report readings that are off by 20 to 80 BPM during high-intensity workouts. I noticed similar inconsistencies during interval training. For casual exercise, it was fine, but serious athletes should look at the Apple Watch or Samsung options instead.

The ECG function itself is reliable, and that is what matters most for this guide. If your primary goal is AFib screening rather than workout heart rate accuracy, the original Sense still delivers.

Who Should Buy This

The original Fitbit Sense is a good choice for budget-conscious buyers who want ECG capability and do not mind a few compromises on exercise heart rate accuracy. It is best for general wellness tracking rather than serious fitness training. If you can stretch your budget to the Sense 2, the continuous stress monitoring is worth the upgrade.

10. Withings ScanWatch 2 – Best Hybrid ECG Smartwatch

The Withings ScanWatch 2 is the watch I reach for when I want to look like I am wearing a traditional timepiece while still getting serious heart monitoring. The analog watch face with a small PMOLED display is understated and professional. During a week of office wear, nobody realized I was tracking ECG readings, sleep stages, and activity levels throughout the day.

The 30-second ECG is medical-grade and records a clean single-lead rhythm strip. I found the readings comparable in quality to the Apple Watch, which is high praise. The AFib detection algorithm is validated and provides clear classification. Results sync to the Withings Health Mate app where you can review trends and share PDFs with your healthcare provider.

Battery life is where this watch dominates every other option on this list. I got 30 days on a single charge with heart rate monitoring active, daily ECG checks, and sleep tracking running every night. Thirty days. That means no daily charging routine, no packing a charger for weekend trips, and no waking up to a dead watch because you forgot to plug it in.

The ScanWatch 2 is also HSA and FSA eligible, which means you can use pre-tax health savings to purchase it. This is a practical advantage that can save you meaningful money compared to paying out of pocket for other ECG watches. The sapphire glass display and stainless steel case give it the durability of a proper Swiss-style watch.

30-Day Battery and Hybrid ECG

The hybrid approach means you get a real watch face with physical hands plus a small digital display that shows notifications, health data, and ECG results. The digital display is small but readable. I found it adequate for checking my current heart rate, seeing an ECG classification result, or glancing at a notification.

The main limitation is GPS, which relies on your phone’s connection rather than a built-in GPS chip. For outdoor workouts, you need to carry your phone to get route tracking. This is a reasonable trade-off given the 30-day battery life, but runners who want to leave their phone behind should consider Samsung or Apple instead.

Who Should Buy This

The Withings ScanWatch 2 is perfect for anyone who wants medical-grade ECG in a classic watch design with extraordinary battery life. It is ideal for professionals, anyone who prefers analog aesthetics, and people who can use HSA or FSA funds. It works with both iPhone and Android, making it one of the few platform-agnostic ECG options. If you also care about battery endurance, see our picks for smartwatches with long battery life.

11. Samsung Galaxy Watch FE – Most Affordable Samsung ECG Option

The Samsung Galaxy Watch FE is Samsung’s entry-level ECG offering, designed to bring heart monitoring to a wider audience. I tested it for a week and found that the ECG experience is essentially the same as the Galaxy Watch 7. You open Samsung Health Monitor, rest your finger on the sensor, and get a 30-second rhythm recording with AFib classification. The fact that Samsung did not cut corners on the ECG sensor for this budget model is commendable.

The lightweight design at just 26.6 grams makes it one of the most comfortable watches for all-day and overnight wear. I wore it to bed every night during testing and never found it distracting. The sleep coaching with Galaxy AI provides sleep stage tracking and personalized tips, which is impressive for this price range.

The BIA sensor is a nice bonus at this price point, letting you track body fat percentage and muscle mass trends. I used it weekly and found the readings consistent enough for tracking changes over time, even if the absolute numbers are estimates. The 1000-nit OLED display is bright enough for outdoor visibility.

The main sacrifice is battery life. I got about 24 to 30 hours with moderate use, which means daily charging for most people. With the always-on display enabled and heavy notification use, expect closer to 18 hours. The 16GB storage is also more limited than the 32GB found in the Galaxy Watch 7 and 8.

Affordable ECG Entry Point

The Watch FE proves that you can get legitimate FDA-cleared ECG monitoring without spending hundreds. The Samsung Health Monitor app is the same across all Samsung watches, so you are not getting a watered-down version of the ECG feature. This matters because the AFib detection algorithm and rhythm classification are identical to what you get on Samsung’s premium models.

The fitness tracking covers step counts, active minutes, calories burned, and over 90 workout types. It is comprehensive enough for casual fitness enthusiasts, though competitive athletes will want the more advanced metrics from the Galaxy Watch 8 or Ultra.

Who Should Buy This

The Galaxy Watch FE is the best Samsung ECG watch for anyone on a tight budget who still wants reliable heart monitoring. It is perfect for first-time smartwatch buyers, students, and anyone who wants to try ECG tracking without a big investment. You get the same core ECG functionality as Samsung’s more expensive models in a simpler package.

12. Apple Watch Series 9 (Renewed) – Best Value Apple ECG Watch

The Apple Watch Series 9 in renewed premium condition gives you Apple’s excellent ECG technology at a reduced price. My review unit arrived looking virtually brand new, with no visible scratches on the display and 94 percent battery health. The ECG app performs identically to the Series 11, using the same single-lead sensor to detect AFib and record rhythm strips that you can export as PDFs for your doctor.

Health features include blood oxygen monitoring, temperature sensing for cycle tracking and wellness insights, and detailed sleep stage tracking. The sleep data breaks down REM, Core, and Deep sleep with heart rate and respiratory rate overlays. I compared the sleep data against the Apple Watch Series 11 and found the results nearly identical.

The S9 chip powers a bright display and smooth interactions. I never experienced lag when switching between the ECG app, workout tracking, and notifications. The 64GB storage gives you plenty of room for apps, music, and health data. The renewed premium certification from Amazon means it has been inspected and tested, with a one-year warranty.

The main variable with renewed units is battery health. Most reviews report 90 percent or higher battery health, but some users have received units with lower capacity. My testing unit held a charge through a full day with about 20 percent remaining, which is adequate but not generous. The watch charges from zero to full in about 90 minutes.

Renewed Apple ECG Experience

Getting Apple’s ECG technology at a lower price is the main appeal here. The health tracking is virtually identical to newer Apple Watch models, with the same FDA-cleared ECG sensor, blood oxygen monitoring, and sleep tracking. You do miss out on the hypertension notifications and slightly improved battery life of the Series 11, but the core heart monitoring is the same.

The setup process was smooth. I transferred data from my current Apple Watch in about ten minutes, and all health history carried over seamlessly. The iPhone integration remains Apple’s biggest advantage in the smartwatch space.

Who Should Buy This

The renewed Apple Watch Series 9 is the smartest way for iPhone users to get ECG monitoring without paying full retail for the latest model. It is ideal for anyone who wants Apple’s health tracking ecosystem at a more accessible price point. Check the battery health rating before purchasing, and verify that the charger is included.

How to Choose the Best ECG Smartwatch for Your Needs

Picking the right ECG smartwatch comes down to understanding what matters most for your situation. I have tested all 12 watches in this guide, and here are the factors that actually make a difference when choosing.

FDA Clearance – Why It Matters

Not all heart rate monitors are created equal. An FDA-cleared ECG smartwatch has gone through regulatory review to prove it can accurately detect atrial fibrillation. Every watch in this guide carries FDA clearance for its ECG feature. This is important because it means the AFib detection algorithm has been validated in clinical studies. A watch without FDA clearance might track heart rate, but it cannot legally claim to detect AFib. If heart health monitoring is your primary reason for buying, do not settle for anything less than FDA-cleared ECG.

ECG Accuracy – What to Expect

Smartwatch ECG sensors are single-lead devices, which means they capture one view of your heart’s electrical activity. A clinical ECG at a hospital uses 12 leads for a complete picture. So while a smartwatch ECG can detect AFib and irregular rhythms with good accuracy, it cannot replace a full medical evaluation. Think of it as a screening tool that alerts you to potential issues, not a diagnostic device. Studies have shown that the Apple Watch and Samsung Galaxy Watch ECG sensors detect AFib with roughly 94 to 98 percent specificity, meaning when they say your rhythm is normal, they are almost always right.

Ecosystem Considerations: Apple vs Android

Your phone choice largely determines your smartwatch options. Apple Watches only work with iPhones, and while Samsung watches technically work with any Android phone, you get the best experience with a Samsung Galaxy device. The Withings ScanWatch 2 is one of the few quality ECG options that works equally well with both platforms. If you switch between iPhone and Android, the Withings is your most flexible pick.

The community on Reddit consistently highlights this as a pain point. Many users want an Apple Watch-level ECG experience on Android, and while the Samsung Galaxy Watch 8 comes close, the overall app ecosystem and health data management on Apple’s side is still more polished.

Battery Life and Charging

Battery life ranges from one day on the Apple Watch Series 11 to thirty days on the Withings ScanWatch 2. The trade-off is features versus endurance. Full smartwatches with bright AMOLED displays and extensive app support need daily or every-other-day charging. Hybrid watches like the Withings sacrifice the full-color smartwatch experience for weeks of battery life. If daily charging annoys you, the Fitbit Sense 2 with its six-day battery or the Withings ScanWatch 2 with its 30-day battery are worth considering. You can also check our dedicated guide to smartwatches with long battery life for more options.

Additional Health Features Worth Having

ECG is the headliner, but the best smartwatches with ECG also offer blood oxygen monitoring, sleep tracking, fall detection, and stress management. Samsung stands out with blood pressure monitoring, which Apple does not offer. Fitbit excels at stress detection with its cEDA sensor. The Apple Watch Series 11 adds hypertension notifications, which is a new frontier for wrist-based health tracking. Consider which combination of features matches your health priorities before making a final decision.

If you are buying primarily for fitness alongside ECG, our guide to the best fitness trackers with heart monitoring covers additional options that might fit your workout routine better than a full smartwatch.

FAQ

Final Thoughts on the Best Smartwatches with ECG

Finding the best smartwatches with ECG in 2026 comes down to matching your phone ecosystem, budget, and health priorities. The Apple Watch Series 11 delivers the most polished ECG experience overall, with seamless data sharing and the most clinical validation behind it. For Android users, the Samsung Galaxy Watch 8 offers FDA-cleared ECG alongside blood pressure monitoring and the brightest display in its class. If battery endurance matters more than apps, the Withings ScanWatch 2 provides medical-grade ECG with 30 days between charges.

Every watch in this guide carries FDA clearance for AFib detection, which means you can trust the ECG readings as a legitimate screening tool. I recommend picking the watch that fits your daily routine and phone, then using the ECG feature consistently. Heart health monitoring only works if you actually wear the watch, so choose one you will be happy putting on every morning.