9 Best Fitness Tracker With ECG | A Watch That Reads Your Pulse

Check price on Amazon

The same health engine as the top pick, shrunk for smaller wrists.

Small wrists and a preference for a discreet watch drive this pick. The 41mm case is the smaller of the two Series 9 sizes, and it carries the same ECG app, blood-oxygen readings, and irregular-rhythm alerts as the 45mm model. The carbon-neutral aluminum case pairs with a Sport Loop band, and the whole package stays light enough that you forget it is there.

Owners who moved to it from older Apple Watches describe a watch that tracks vitals without fuss — respiration, pulse, sleep, wrist temperature, and blood oxygen all land in one app. The screen stays navigable for notifications even at this size, which is the trade-off you accept for the smaller footprint. One buyer who wears it while active says it needs charging pretty much every day.

Here is where it stands against the 45mm: this one is listed at 8.1 ounces while the 45mm model is listed at 2.12 ounces — a strange spec listing, but it shows the two sizes are not interchangeable on the wrist. What surprises people most is the safety side. One owner reports the watch flagged a 33 bpm overnight heart rate that led to a pacemaker, then a 130 bpm AFib episode that sent them to the ER. For a compact wristwatch, that is a lot of backup.

Check price on Amazon

The slim band that runs a week and still reads your heart.

Seven days. That is the number that makes the Charge 6 worth a closer look, listed as its battery average life, with a 2-hour charge time from empty. For anyone who has grown tired of plugging a watch in every night, this is the point of the whole device. It still packs an ECG sensor, plus 40+ exercise modes, built-in GPS, and 24/7 heart rate tracking in a slim band that does not snag on sleeves.

The silicone band comes in a 22-centimeter length, so it fits a range of wrists, and the stainless steel case keeps the hardware looking tidy. Sleep stages, a nightly Sleep Score, a stress management score, and turn-by-turn directions from Google Maps are all on board. Owners who came from a full smartwatch appreciate the smaller footprint; as owners mention, it is built for health tracking over a big screen, and the battery keeps it consistent.

The honesty part: this is the most uneven performer in the lineup. Its rating sits at 4.0+ stars, and the recurring gripes are real — the ECG and heart data can be off, the watch can drop its phone pairing, and the durability record is shaky over the long term. For most buyers the week-long charge and slim fit outweigh that. If you need rock-solid accuracy and a big display, the Galaxy Watch 7 below is the better bet.

Check price on Amazon

A refreshed Galaxy that looks pristine and moves through menus fast.

The headline hardware here is the next-generation 3nm processor — the Exynos W1000 chipset — which makes the menus snap and app navigation feel quick. That speed matters on a watch because you are usually tapping with one hand while moving. The 40mm aluminum case in Cream pairs with a 20-millimeter silicone band, and the battery is rated at 300 milliamp-hours with an average life of 30 hours.

This is a Renewed unit, which is worth naming plainly. Owners describe the renewed watches arriving with no scratches or damage, and the only giveaway being third-party seals in place of the original Samsung packaging. Pairing with a Galaxy S23 went smoothly and stayed stable for months in those accounts. Hearts and sleep get tracked, sleep monitoring is singled out as a strength, and the display reads clearly in daylight.

The battery is the point of friction. Customers note roughly two days of use with the always-on display switched off, and first-day rapid drain that settles after a full charge and software update. The 40mm band runs small — one wearer needed a third-party band for a comfortable fit. If you sleep-track around shift work, you will need a charging window that does not overlap your night.

Check price on Amazon

A titanium tank for trail days, with body data you can read on your wrist.

Built for the outdoors crowd, the Watch 5 Pro wraps a titanium case and sapphire crystal glass around its sensor stack, and the glass is described as ready for intense activity in rough terrain. The BioActive Sensor curves to sit closer to your skin for heart-rate readings, and body composition analysis puts body fat, skeletal muscle, body water, basal metabolic rate, and BMI onto your wrist. Auto Workout Tracking catches runs, rows, and swims, and manual tracking covers more than 90 exercises including HIIT.

GPS Route Tracking follows GPX-format routes on the watch, and Track Back helps guide you to where you started. Voice or vibration turn-by-turn guidance keeps your eyes off your phone. The LTE connection means calls and messages can arrive without the phone nearby, and the silicone band with a foldover clasp stays put during training.

Charging lands in a workable range: reviewers point out roughly 2 to 3 days of normal use, and closer to 4 days with the power-saving mode turned on. The catch is software friction — this watch is older Samsung hardware, and some features like body-composition readings require Samsung’s companion setup and a compatible Galaxy phone to make the most of it. A few owners find the navigation less tidy than an iPhone-based watch. Still, for a rough-and-tumble training watch, the titanium build is the draw.

Check price on Amazon

For traditional watch lovers who want weeks of charge and quiet health tracking.

Thirty days is the number that defines this one — a full month on a single charge, with sleep monitoring and 24/7 heart tracking running the whole time. In a category full of screens begging to be charged, a stainless steel case and a fluoroelastomer band that looks like a classic watch is a distinct choice. Connected GPS works through your phone, so it does not need a satellite receiver inside the case.

The analog hands and small display keep things discreet, and cycle tracking joins the activity and sleep monitoring. HSA and FSA eligibility is worth knowing if you have a health spending account to draw from. Owners who bought it for battery life describe going weeks between charges, and the style draws compliments in a way a plastic smartwatch rarely does.

The trade-offs stack up in a few places. Its step counting and overall functionality sit in mixed territory — some owners call the pedometer generous, others say it under-counts. The raised glass is prone to scratches and deserves a screen protector, and the analog time can need a reset after charging. The charging cable is the weak link that shows up in complaints. If none of that sounds like a dealbreaker, the look and the month-long charge more than carry it.

Check price on Amazon

A titanium bruiser that compares your run today against your last one.

At 590 milliamp-hours, the battery in the Watch Ultra is the largest capacity in this lineup, and it is rated for an average life of 60 hours with a 2-hour charge time. The titanium case is built to handle rain, dust, and ocean swimming, and the 20-millimeter band is silicone for a secure fit during long efforts. This is the watch for the person who trains outdoors and does not want to baby their gear.

Galaxy AI is the story on the software side. Energy Score takes yesterday’s sleep, heart rate, and steps and turns them into a readiness number, while Wellness Tips feed you daily suggestions based on data collected by the watch and analyzed on your phone. Heart Rate Tracking filters out body movement to sharpen readings during workouts, and a programmable quick-launch button jumps you straight to the app you use most.

Owners who upgraded from the Watch 5 Pro describe health apps, fall detection, and the display as strong points, with battery life improving after software updates. The honesty note: sleep tracking has been reported to miss hours, especially early in the night, and the watch is bulky on a small wrist. It is also the most expensive-feeling Samsung here, though owners argue the titanium build justifies the upfront cost over replacing cheaper trackers.

Check price on Amazon

The dress watch that hides a full health lab behind stainless steel hands.

Stainless steel on the case and the band, a deployant clasp, and a look that does not read as a plastic toy — this is the watch for someone who wants health tracking without giving up a formal finish. The 30-day battery life means you are not hunting for a charger between events. A 2-hour charge time refills it when the month finally runs out.

What sits underneath is the real story. TempTech24/7 logs baseline body temperature and fluctuations the maker says may signal illness onset, and it feeds workout temperature variation zones. SpO2 measures blood oxygen on demand and tracks overnight for breathing disturbances. Sleep tracking captures duration, light and deep sleep, interruptions, regularity, and a Sleep Quality Score. Activity tracking recognizes 40+ activities, and a VO2 max estimate gives you a fitness level reading. Connected GPS runs through your phone.

This is a brand-new model with a small track record, so the reviewer pool is thin and the track record short — worth knowing if you lean on long histories before buying. The metal strap takes a tool to adjust, which is a hassle compared with a tool-free quick-release. Owners who bought it describe an elegant watch that handles running, walking, and other activities accurately, and one that came with an extra sports strap that swaps in easily.

Check price on Amazon

The iPhone-free watch — calls, messages, and ECG with no phone in reach.

Cellular is the reason to pay attention to this one. With a service plan you can send a text, make a call, and stream music without your iPhone nearby, and the ECG app records a rhythm reading whenever you open it. The 46mm case is the larger of the two Series 10 sizes, and the display is described as up to 30 percent more screen area than the previous generation. Faster charging is listed at 80 percent battery in about 30 minutes.

On top of that it adds ECG readings, high and low heart rate alerts, irregular-rhythm notifications, and sleep apnea detection. The Vitals app shows overnight heart rate and respiratory rate, and the depth and water temperature sensors make it useful in the water. The case is crack resistant, IP6X-certified dust resistant, and rated to 50m water resistance. The included AppleCare+ plan covers unlimited repairs for accidental damage like a cracked display.

Honesty check: battery life still lands in the daily-charge camp, and owners wish it lasted a week. This is a premium-priced Apple Watch, and the gold titanium finish is part of what you are paying for. Owners who paired it with an iPhone SE from 2020 confirm it works with the older phone, which is not always the case with newer models.