Turn off your screen when you not use it. It ask for how long delay between cheaks. It took a lot of battery when set too quick cus it use a lot of sensor block. Set it to 10 sec or something.
Note: if it's too sensitive, you can aways edit some blocks on flow.
Update 1: added more sensor block. Now it will also gonna turn off when placed on table!
Update 2: fixed silly mistake on update 1
Update 3: now it dont cheak sensor even while locked. Longer battery time!
Update 4: tweeked pocket detection. Now it dose not randomly lock in dark room.