Deceptively simple

This app makes a low humming sound when you open it in a dark room, and the sound changes pitch depending on how much light the camera sees. When I first opened it I thought it wouldnt be that useful, but I just didnt realise how many things are indicated by a little light. Ive used it to tell if an old cell phone was charging, if the coffee pot was on, if a light was burned out, if the kids had the light on in their room after bedtime, and even if a stick of incense was still burning. Its very sensitive and reliable.

Phaebear about Light Detector