Recommended iPad App: Session Time Remaining Awareness Clock

I purchased 20 copies of Session Time Remaining Awareness Clock for my teachers. It might by the worst title for an app I have seen yet, but it works like a charm.

Elementary students struggle to measure the duration of an event. My building purchased visual timers a while ago, but they are starting to break. This app, for only $1, shows how much time has passed in red, and how much to go in green. The app has fast forward and rewind buttons. It also plays chimes when time is up. I could see it being used for a math fact quiz, to measure stamina during Daily Five, or for a science experience.

What possibilities do you see? Please share in the comments.