I was stunned to get a low battery alert at 7:00 pm tonight. (I put it on at 5:30 am this morning.) Usually by 10:00 pm I still have over 40%. Is there any way to check for battery usage by app on the Apple Watch (via the iPhone watch app, I'm assuming)? The only app usage I see is size of apps loaded on the watch. It would be nice to know whether it was a misbehaving app or whether the Bluetooth connection was flakey.