Do not waste time and money. Buy directly 4TOOLS HD.
Four applications in one: Bubble Level, Timer, Ruler, Torch.
This wonderful app will allow you to have all the major utilities, all included in one single application!!!
+ Bubble Level: You will measure if everything around you is flat.
+ Timer: Beautiful countdown application.
+ Ruler: Use your iPad as ruler. Fantastic Wallpapers.
+ Flashlight: Illuminate dark environments with the magnificent layout torch.
Well ... 4 Tools, all in only 1 great App.