App is an unmitigated disaster. Every other "update" completely breaks the app and makes the watch unusable. Latest update (4.9.1) resulted yet again in random massive battery drain in the phone (>30%/h!) and watch constantly losing connection to phone. I had to roll back to 4.8.1 to keep watch usable at all. This is deeply frustrating since the watch itself is quite fine. It has been more than a month since the release of this broken app and the internet is teeming with frustrated customers, and yet nothing has been remedied... if you haven't bought the watch yet, think twice: without a working app, the Fossil HR watch is useless!