When downloading data via bluetooth, at progress of around 20% watch is restarting and loosing connection with iPhone, same with iPad. Then I must recconect watch, sometimes pair as a new, because it fails to reconnect. Second problem this App presents wrong data - pace is too low, endomondo app on the base of the same data from this watch presents correct pace. Third - application is slow, very often is stacking despite ( I use iPhone 6 so its not a matter of old phone - at iPhone 4s all that things happend as well)... Its a shame, Tom Tom...