Our readers keep the lights on and my morning glass full of iced black tea. As an Amazon Associate, I earn from qualifying purchases.9 Best ECG Watch | Your Wrist Can Now Track Heart Rhythm

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The Series 11 takes the crown as the most complete health smartwatch available, integrating a clinical‑grade ECG app with newly added hypertension notifications. You can record a single‑lead ECG in 30 seconds directly from the wrist, and the watch alerts you if signs of chronic high blood pressure emerge — a feature no competitor currently matches. The 46mm case with Jet Black aluminum keeps weight low, and the always‑on display makes ECG initiation seamless without needing to tap a tiny button.

Sleep tracking is detailed enough to capture overnight HRV trends, crucial for spotting arrhythmias that occur during rest. The Vitals app consolidates overnight metrics, and blood oxygen readings (SpO2) are available on demand. Battery life hits roughly 24 hours under normal use, but fast charging — 15 minutes for 8 hours of use — means a morning top‑up easily covers a full day plus overnight sleep tracking.

For iPhone users, ECG readings sync directly to the Health app and can be exported as PDFs for your cardiologist. The 5G cellular model adds the ability to call emergency services without carrying your phone, which is a meaningful safety layer for anyone with a diagnosed heart condition. The only catch is the high entry cost, but the breadth of FDA‑cleared features justifies the investment for serious health monitoring.

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The Galaxy Watch Ultra is Samsung’s answer to extreme durability paired with medical‑grade ECG. Its titanium case and 10ATM water resistance let you wear it while ocean swimming or hiking in rain, all while the Samsung BioActive sensor records a single‑lead ECG that can detect AFib. The 47mm AMOLED screen is bright enough for direct sunlight, and the new Energy Score with Galaxy AI factors in yesterday’s HRV, sleep, and steps to gauge readiness — a useful overlay for anyone managing cardiac load.

Heart‑rate tracking during workouts is more precise thanks to AI that filters out arm movement artifacts. The LTE version means you can leave your phone behind and still make calls or stream music, which is a huge plus for runners who want to stay reachable in case of an abnormal ECG reading. Battery life stretches to about 60 hours in typical mixed use, easily covering two nights of sleep tracking before a recharge.

On the downside, the watch only works fully with Android phones, and the ECG app is not available in every region. The titanium case is sturdy but adds noticeable weight compared to aluminum models. For Android users who want military‑grade toughness and FDA‑grade ECG, this is the benchmark.

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The Forerunner 970 marks Garmin’s most serious push into ECG‑enabled training watches. Its ECG app records a heart rhythm and checks for signs of atrial fibrillation — a feature previously reserved for Garmin’s medical Venu line. With a lightweight titanium bezel, sapphire lens, and a built‑in LED flashlight for early‑morning runs, this watch is purpose‑built for triathletes who need ECG screening without sacrificing training metrics like running economy or step‑speed loss.

Battery performance is exceptional: up to 15 days in smartwatch mode and 26 hours in full GPS mode, meaning the ECG sensor stays active for days without a recharge. The AMOLED touchscreen is Garmin’s brightest yet, and the HRM‑600‑ready running dynamics give coaches data on ground contact time and vertical oscillation. The Training Readiness Score combines sleep quality, HRV, and training load to tell you when to push and when to rest — essential for cardiac recovery days.

The downside is the price and the learning curve. Garmin’s interface is dense, and ECG recordings require a still moment — not practical during a sprint. But for athletes who want a single watch that handles marathon training and heart‑rhythm screening, the Forerunner 970 is the most capable tool available.

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The Apple Watch Ultra 3 is the most rugged ECG‑enabled wearable on the market, with a titanium case and sapphire crystal display that survives 100‑meter water resistance. Beyond ECG, it adds satellite‑based emergency texting — critical for trekkers who lose cell service. The larger 49mm screen makes the ECG app interface easy to read, and the customizable Action Button can be set to launch an ECG recording instantly, which is handy when you feel a palpitation during a hike.

Battery life reaches 42 hours in normal mode and 72 hours in Low Power Mode, enough for multi‑day backcountry trips. The dual‑frequency GPS stays accurate in canyons and dense forests, and the new hypertension monitoring (inherited from Series 11) adds another layer of cardiac screening. The watch also tracks sleep score and overnight HRV, giving you a comprehensive picture of heart health even when you’re off the grid.

The main barrier is the high price and the fact that the ECG app and health features require an iPhone. The size (49mm) may overwhelm smaller wrists. For anyone who needs a phone‑free emergency beacon and clinical‑grade ECG in a single package, nothing else comes close.

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The Fenix 8 Solar is Garmin’s pinnacle endurance watch, and it now includes an FDA‑cleared ECG app for recording a heart rhythm and checking for AFib. The 1.4‑inch solar‑charged display can extend battery life to 48 days in smartwatch mode, meaning the ECG sensor stays operational for weeks without a charge — a game‑changer for long expeditions where charging is impossible. The scratch‑resistant sapphire lens and fiber‑reinforced polymer case with a titanium bezel make it nearly indestructible.

Dive‑rated to 40 meters with leakproof metal buttons, the Fenix 8 is also a scuba computer that tracks depth, ascent rate, and no‑decompression limits while simultaneously logging heart rhythm data. The built‑in LED flashlight and multi‑band GPS with SatIQ ensure you never get lost, and the off‑grid voice command lets you control functions without a smartphone. Sleep monitoring is advanced enough to capture overnight HRV and Pulse Ox, which are essential for detecting nocturnal arrhythmias.

The main drawbacks are the price — it’s the most expensive watch in this roundup — and the sheer 51mm size that dominates the wrist. For dedicated adventurers who also need a medical‑grade ECG tool, the Fenix 8 Solar is the ultimate all‑in‑one companion.

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The Scanwatch Nova is a hybrid that hides a medical‑grade ECG sensor inside a classic analog watch with a stainless steel case. You record an ECG by pressing the crown with your opposite hand — a deliberate process that feels more like a clinical test than a fitness‑tracker tap. The watch received FDA clearance for its AFib detection algorithm, and the 30‑day battery means you never have to worry about it dying overnight. The TempTech24/7 module tracks body temperature fluctuations, which can indicate early illness.

SpO2 readings are available on demand, and the Withings app provides clear sleep‑stage breakdowns including interruptions and regularity score. The watch automatically recognizes 40+ activities and logs them without a constant GPS drain. For someone who wants a watch that looks like a dress watch but provides real ECG data, the Scanwatch Nova is unmatched.

The trade‑off is the absence of a touchscreen — all interaction is via the crown and a small PMOLED display inside the dial. Notifications are basic, and there is no on‑watch alarm for exercise intervals. The app is sometimes sluggish, but the core medical features are rock‑solid. If you value style and battery life over screen‑time, this is the ECG watch for you.

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The Fitbit Sense 2 pairs its FDA‑cleared ECG app with a continuous electrodermal activity (cEDA) sensor that tracks stress responses throughout the day. This combination makes it uniquely suited for people whose heart‑rhythm irregularities are linked to stress or anxiety. The ECG app is simple — rest your fingers on the case edges for 30 seconds — and the watch alerts you if it detects an irregular rhythm suggestive of AFib. The Stress Management Score distills cEDA, heart rate, and sleep data into a single readiness metric.

Sleep tracking is a core strength: the watch automatically logs sleep stages and provides a Sleep Score the next morning. The smart wake alarm gently vibrates during light sleep, and the do‑not‑disturb mode syncs with your schedule. Built‑in GPS and 40+ exercise modes cover most activities, and the 6‑day battery (with ECG disabled most of the time) is enough for a full work week plus weekend.

Where the Sense 2 falls short is the aging processor — interface lag is noticeable compared to the Apple Watch or Garmin models. The ECG app also requires a still moment and a steady hand; movement ruins the trace. For someone focused on stress‑related cardiac monitoring, the Sense 2 offers unique cEDA data that competitors lack.

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The Amazfit Active 2 is the most affordable smartwatch that offers ECG‑like health tracking, though its ECG feature is not FDA‑cleared — meaning the single‑lead recording is for reference only and cannot diagnose AFib. That said, the BioTracker sensor provides continuous heart rate, SpO2, and sleep staging that rivals watches costing twice as much. The 1.32‑inch AMOLED display is bright and responsive, and the 10‑day battery life means you can wear it through multiple nights without a recharge.

Zepp OS provides a clean interface with over 160 sports modes, including HYROX Race and strength training. The built‑in GPS with 5‑satellite positioning locks quickly and provides accurate route tracking. For the price, the build quality is excellent — the stainless steel bezel and leather strap (in the Premium version) give it a dress‑watch feel. Speech‑to‑text message replies are a nice touch for Android users.

The lack of FDA clearance for ECG is the most significant omission — if you need a diagnostic‑grade reading, look elsewhere. Sleep tracking accuracy also lags behind Garmin and Apple. For a budget‑conscious buyer who wants reliable 24/7 heart rate and a great screen, the Active 2 delivers exceptional value.

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The EMAY Portable ECG Monitor is a dedicated medical device that records a single‑lead (Lead I) ECG and displays heart rate on a 1.8‑inch screen. Unlike a smartwatch, it’s not a daily wearable — it’s a palm‑sized device you use for 30‑second spot checks at home. But for clinical‑grade accuracy and zero subscription fees, it’s the most trustworthy option on this list. The monitor connects to a PC via USB and to a smartphone via Bluetooth, and the free software lets you upload cases, review waveforms, and share PDFs with a physician.

Users consistently report that the EMAY matches hospital ECG readings for rhythm detection, and the battery lasts for weeks of daily use. The metal case and intuitive buttons make it feel like a professional tool. The device is cleared for over‑the‑counter use, though it warns against use with implanted pacemakers. Setup is straightforward — even non‑tech‑savvy users over 80 reported no issues pairing the app.

This is not a watch, so you won’t get sleep tracking, step counting, or notifications. Its singular purpose — clean ECG recording with no hidden costs — makes it the best choice for anyone who wants a dedicated home ECG monitor to supplement or replace smartwatch‑based readings for peace of mind.