Available now on the iTunes App Store, download here.
Use the force of gravity to dial in how much you want to tip! Pass it around, everyone has fun using the accelerometer and other controls.. even the waiter 
Why get a boring old tip calculator when you could use one that is actually FUN TO USE!
Just rotate your iPhone from side to side and watch the tip grow and shrink.
Also included are more traditional controls to select your tip percentage, such as pickers and sliders.
Watch as the controls dial-in to previously selected percentage as you move between Tipper/Picker/Slider controls.
Set custom application preferences within the Settings app like default rounding state and minimum and maximum percentages.
[...] Tilt-A-Tip Action Tipster [...]