Although I've found a few functional interval timer iPhone apps (like the Gymboss one), most of them tend to be pretty ugly, and also not very flexible. So I decided to try and make my own app. This workout app would let you build your own workouts by combining intervals, repetitions, ladders, pyramids, and even deck of cards workouts. So the main feature is that you wouldn't be limited to just intervals like with most other apps. Would you guys be interested in an app like this? What other feature would you like to see?