Is there a app to lock my screen when the battery reaches a preset % ?

[AC Question]

I need to lock my screen when the battery gets to 15% to prevent my kids from draining to 0%

 

[belodion]

That's a good idea. Have you investigated Tasker?

 

[hashfork]

There's nothing that I'm aware of but Greenify has helped me monitor my usage more closely. It'd seem like an easy app to create, maybe you've given someone an idea.