Smartwatches and fitness trackers beta · Polar
Owners keep the Polar H10 as their workout heart rate strap, and several use it as the yardstick for checking whether their watches and fitness bands are reading heart rate correctly.
Owners praise its heart rate accuracy. People who wore it alongside a Whoop or Apple Watch during workouts found the readings closely matched, and some now rely on it as their main workout tracker. A smaller group disagreed.
Heart rate accuracy is marked as a concern, but in the comments behind it the bad readings come from wrist trackers that owners checked against the H10. One example is a Fitbit that showed spikes during fast arm movement which the chest strap did not show. These comments do not fault the H10 itself.
The Polar H10 is a heart rate sensor that clips onto a soft strap worn around your chest. It has no screen. It sends your heart rate to a watch, phone app or gym machine, so it suits runners, cyclists, swimmers and gym users who want heart rate readings that are more accurate than a wrist sensor gives.
| Display | |
|---|---|
| Battery life | Up to 400 hours (CR2025 coin cell, not rechargeable) |
| Water resistance | WR30 (30 m) |
| GPS | |
| Health sensors | ECG heart rate sensor, accelerometer |
| Works with | Bluetooth LE and ANT+ devices; Polar watches; over 150 sports apps |
| Weight | 0.7 oz sensor only; 2.1 oz with strap |
| Warranty |
From the maker's spec page, checked October 9, 2026. A blank row means the maker does not state it.
At 400 hours, one hour of exercise a day uses up a battery in about a year, and you then put in a cheap coin cell instead of charging it. WR30 means it is fine for sweat, rain and swimming, but it is not meant for diving. It uses both Bluetooth and ANT+, so most watches, bike computers and apps can read it, and it can hold one workout of up to 30 hours when no phone is nearby. It has no screen or GPS, so you need another device to see your heart rate and track distance.
Pick up to three. You get a page with just those, side by side, on the subjects owners raised.
Once the novelty passes, it usually settles in as the strap people put on for workouts, often worn alongside a watch or a Whoop. One owner who bought it for workout tracking is thinking about relying on it instead of an expensive wrist wearable, so they can wear watches they actually prefer day to day. Others bring it out as a reference when they test a new watch, for example during indoor rides on Zwift or while drumming.
The main adjustment is getting its data where you want it. One owner had to set up a bridge to move H10 workouts into Fitbit, then found Fitbit producing cardio load figures that made no sense. The comments say little about comfort or what it is like to strap it on every session.
The part that keeps working is the measurement. In the side-by-side tests owners describe, its readings matched other devices closely, and they trust it enough to judge other wearables against it. None of the sampled comments describes the sensor failing or giving bad readings.
Long-term accounts are thin. Nothing here covers battery life, strap or electrode wear, connection drops, or how the H10 holds up after months or years of use, so this page cannot say how durable it is.
From 1 owner account that said how long they have had it. Own one? Add how long yours has lasted.
Counted from the owners who raised each subject, not from everyone. A subject is judged once at least 4 owners raise it.
7 more subjects came up from fewer than 4 owners each, which is not enough for a fair reading. To see how it stacks up, compare it with another machine.
The same owner, asked again at each point. Fills in as owners answer.
Two questions: how long you have had it, and anything you would like to say about it. Then we ask again as it ages. This helps our mission.
More in smartwatches and fitness trackers: Apple Watch SE, Apple Watch 5, Garmin Venu 3.
Among the 1 owner accounts here that gave a duration, 0 described a failure.
Before you buy one used, ask the seller: how old it is, whether it was ever repaired and by whom, and whether any of the parts above have been replaced. Ask to see it run. A receipt tells you the warranty start date; most makers honour the term only for the first owner.
Public discussions we read and summarised in our own words. Nothing here was submitted to Still Kicks.
Counted from public accounts by people who said they own it, and summarised by Still Kicks in its own words. Not a manufacturer claim, a lab test or an estimate.
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