Watch Battery Monitor
Get notifications as your Apple Watch battery depletes
Competitors & alternatives
WatchGit
Access GitHub from your wrist with the Apple Watch
Watch Routine
Track your workouts using only your Apple Watch
Hooks for Apple Watch
Get notifications about things you care about
Pee & See: Apple Watch Hydration Monitor
Easiest way to monitor your hydration, right from your wrist
Tap Me Every X Minutes
Repeating notifications for Watch