the author of this app says:
The first useful timing app for speedcubers, based off of qqwref's qqTimer. Features: -Scramblers for ALL official puzzles (2x2-7x7, megaminx, pyraminx, square-1, clock). - Ability to save sessions for later lookup. - Shows current and best averages of 3/5/12/100 Future updates will include different scramblers (by request), and even more useful features. Get the app made by World Record Holder Dan Cohen, for a timer that satisfies all your needs!
- Requires iOS 3.0 or later.