2bDone app for iPhone and iPad

You can register tasks to be executed periodically using a simple interface.
There are four types of tasks: workout timers using a countdown, web browsing, playing local sound files, and regular to-dos.
The workout timer allows you to set the number of repetitions, sets, and intervals between sets, and supports your workout with click sounds and voice cues.
You can toggle between a list of all registered tasks and a list of tasks that need to be executed for the day.
Execute the tasks and mark them off the "to-do" list for the day as you complete them.