I'm looking for a good customizable timer/alarm app for 3.1.3. Something that lets you create custom countdown timers and save them. Basically the same sort of functionality as Fishbone Studios Clock Pro, but which doesn't require iOS4. It must also notify when the device is in sleep mode. Does anything like this exist, either paid/free and/or requiring a JB? I've found a few in the app store but none seem to work while backgrounded or in sleep mode.