Quote Originally Posted by Doremus Scudder View Post
I tried using my cell phone to time development once in a pinch, but was dismayed when it lit up like fireworks at the end of the developing time! I suppose you could put it in a drawer...
The Massive Dev chart app for the iPhone has timers built in too, though you would need to hide the phone itself because even with the red light setting enabled, it still would not be filmsafe.