iPi is a tiny little application who's main purpose is to calculate Pi, of course. The producer added some features to the core functionality just to have some fun.

The following formula was used to calculate pi: 4(1-1/3+1/5-1/7...+1/(2n-1)-1/(2n+1)).

Accuracy
34 decimal places is pretty accurate for home purposes, but if you really need to know, iPi displays the last calculation and the current calculation number.

Speed Options
Do you want to test your system's speed? Just click the Fastest Performance box and get ready for the torrent of calculations.

Pause Calculations
Users can easily pause and resume... whenever they want. You can easily save and open dedicated .pi files using iPi.

Here are some key features of "iPi":

· Speed slider: Adjusts the speed of the calculation. Minimum=1/1000 of a second. Maximum=1 second.
· Fastest performance: Makes your computer calculate pi at its fatest possible rate.
· Display frequency: Displays the calculation after this many calculations have gone by.
· Calculate: Starts/resumes calculating pi.
· Pause: Pauses the calculation.
· Start over: Starts the calculation from the beggining.
· Save: Saves your current pi calculation into a .pi file.
· Open: Opens a saved .pi file.
· Time: Elapsed time calculating the current pi.
· Accuracy: This is the last calculation that was computed.
· Calculation #: How many calculations have been done.