WarikanCalc.

Usage
・First, enter the amount paid to the store, then press the M, A-D buttons to enter the person who paid first, and then the person who should pay.
・People who should pay -> Payers After receiving the money, enter the result.
・The current status is displayed in the gray area.
・You can write a comment by tapping the cell.
・You can save with Menu → SAVE.