This is a pretty cool idea. I have the Patterson Triple Timer which I really liked initially. But after 1.5 years of use, the buttons are sticking and sometimes will "shut off" after dev timing begins. Sound awful? It is. I use a metronome to time agitation cycles so when the Triple Timer goes out I start counting the beats for dev times. I wonder how this app would work with open tray and the light produced by the iPod. Once it goes to sleep the screen is dark. But is there a way to shut off the light on the iPod to guarantee it won't light up like Las Vegas during processing?