Polar H10 Size XS-S

I bought this chest strap HRM as a replacement for a generic OTF brand one I’d had for nearly 10 years. On this one, the sensors stopped working after 6 months and Polar warranty doesn’t cover damage to the chest strap. What a waste of money. They want me to spend $65 to replace the strap. No thank you.

I will have to return this unit because the provided M-XXL strap is too small. I am a size large, but the provided strap is too tight at full adjustment. My strap can be adjusted to 33 inches (excluding clip), which doesn't correspond to the specification of any of the available strap sizes.

I was very happy with this device until the recent firmware update. After updating, it no longer works with my Technogym treadmill. Technical support has been unresponsive and not helpful, and there’s no way to roll back to the previous firmware. Until compatibility is fixed or a rollback option is provided, I can’t use it with my treadmill and wouldn’t recommend it to Technogym users.

Simple and effective. I purchased this to get a more accurate HR reading on my Apple Watch while skate skiing and uphill ski skinning, both of which have arm movements that could cause cadence errors in wrist-based monitor. It has worked very well for this purpose.

Paired quickly to Apple Watch. I got it to have better cold temp heart rate readings. Apple Watch is terrible at heart beat reading in cold temps.