My Subtraction
Arithmetic Study Tool
Minimum Requirements Palm OS® 4

This flashcard program is a great way to learn 0-0 through 24-12. The Scramble/Unscramble buttons allow for sequential study (1-1, 2-1, 3-1, etc) or scrambled order for more challenge.

The program supports color, but does not require it. The program takes about 31K, with the runtime (common to all Smartacus PDA products) taking an additional 120K.