1. project and track your expenses and income across all your accounts e.g. checking, savings, credit cards, etc.
2. count things easily e.g. calories, bank balances, card game scores, etc.
3. create recurring reminders e.g. mow yard, haircut, change furnace filters, replace toothbrush, etc

It also has a widget to show you at a glance upcoming events and transactions, and allow you to jump
directly to one of the three functions.