The Polar H10 has excellent heart rate measurement and can connect to two Bluetooth devices at the same time. I connect it to my phone and computer (for heart rate tracking in VR), but it can also connect to the gym while you're using it. It takes some adjustment to find the right tightness to keep it in place without being too tight. As for the app, I can't say enough good things. I found it very difficult to connect the first time and often failed to connect while wearing the tracker. I tried to reconnect the tracker and failed completely. The third attempt at re-pairing worked, but no better than the first time. Workouts must be started and stopped manually. GPS tracking isn't as good as Google Fit or even Fitbit. The app requires too many permissions for what it is. Bottom line: Great hardware when connected to something other than the app, worth the price, but use something else to track your workouts. I use Samsung Health and sync everything to Google Fit and also use YUR to track my VR workouts on PC.
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