Pairing can be an issue when Polar H10’s battery is replaced, and the pairing process is confusing. PolarBeat requests BT connection, and then the iPhone does, too. So, the device appears to be connected to both. It’s confusing because you don’t know to which device you are connected first, which is vital if you want to connect H10 to PolarBeat and an external equipment, such as Bowflex trainer. So, if you are already connected to the trainer, and then you want to connect to the second (the maximum) device, it gets infuriating to determine to which system (that is, iOS or Polar app) you are going to be connected. So you’ll just have to fiddle a lot with all those switches — turning on/off Bluetooth, unpairing H10, restarting the devices.
Also, there’s still no native iPad polar app.
Lastly, PolarBeat is vertical only. Which is ok, but then, the provided colored chart at the bottom is too small to be useful. So, viewing it in a landscape mode would be great.