My HR Monitor uses internal HR sensor in your Android Wear 2.0 watch and monitors your HR 24/7 depending on the activity you selected. This is standalone application and does not require a connection with phone.
To select current activity level, just swipe down in main screen and tap on Activity button.
At the moment My HR Monitor supports Rest, Walk and Sport activity. Rest activity will scan HR in much less interval then Sport activity.
You can also setup BPM warning value and your watch will vibrate if you reach selected BPM rate. To select BPM warning value you should simply swipe down while in Activity selection screen.
All scanned values are represented in daily chart but you can always swipe up/down to see charts for previous days.
Please visit http://myhrmonitor.com for additional info