Best Smartwatch with ECG of 2026

The Sense 2 puts stress front and center with its cEDA sensor, which measures changes in sweat activity and turns them into a Stress Management Score. That is more useful than a vague reminder to relax. We found the framing helpful because it gives you a baseline: if your score drops after a bad night, you can connect the dots instead of guessing. The ECG app and irregular-rhythm notifications are here too, and they are the reason this watch belongs in this guide.

Sleep is the other half of the pitch. The Sense 2 logs sleep stages, gives you a daily Sleep Score, and wakes you with a smart alarm, and the 6+ day battery means you can wear it overnight without charging every morning. We like the Daily Readiness Score as a check on whether to push a workout or take it easy; it is the kind of nudge that makes the watch feel like a coach rather than a pedometer. The 40+ exercise modes and built-in GPS cover the basics, though we do not call the workout experience as polished as the health side.

Longevity is the caveat: the watch can stop working after about 18 months, so we treat this as a health coach for a couple of years rather than a decade-long purchase. The cEDA score is the feature we check first every morning, and the sleep score is the last thing we look at before bed. That daily loop is what makes the Sense 2 worth its runner-up spot.

The Sense is the budget route to a real ECG reading, and it still covers the basics that matter: stress sensing, skin temperature, GPS, and a 50-meter water rating. At 30 grams, it is light enough to forget you are wearing it overnight, and the six-day battery means you do not have to build a charging ritual around it. We like it as a second watch or a first ECG device for someone who wants the health features without the newer model's price.

The listing itself needs a second look: the included-items line names a Versa 3 even though the model number is the Sense. Confirm you are getting the Sense before you order, because the two models are not interchangeable. The watch can also stop working after about a year, so we treat this as a budget backup or a first ECG device, not a buy-it-for-a-decade watch.

The model-number check is the one thing we do before adding it to the cart; after that, the six-day battery and 30-gram build make it an easy overnight watch. It is not the watch for someone who wants the newest interface or the deepest training analysis, but it covers the ECG basics, and the light build is the reason it disappears on the wrist.

A renewed Galaxy Watch 4 is the least expensive way to get LTE and ECG on an Android wrist, and that combination is more useful than it sounds. Leave your phone at home and the watch can still send texts and use LTE data, and fall detection is on board for peace of mind. The 40mm aluminum case is the smaller option here, and the 50-meter water rating covers showers and pool laps. We choose it as a travel watch or a second line before we choose it as a primary fitness watch.

The 247 mAh battery is the number to watch. The watch often needs a daily charge, and some days it does not make it through, so plan a top-up before bed rather than expect to wear it for sleep every night. The renewed condition is the other variable: some units arrive looking new, while others show scratches or a chipped frame. Buy from a seller with a clear return window, and check the battery health in the first week.

For short errands, a daily charge is a fair trade for leaving the phone at home. The ECG app and fall detection are the safety features that make the LTE version worth considering, and the 40mm case is small enough for a wrist that finds the 42mm Classic too much. It is not the watch we pick for a marathon block, but it is the one we pick for a cheap, connected safety net.