Tip Currency Calc

This application can do the followings...
- calculation of tip
- calculate the charge per person
- calculate foreign currency to your national currency
- download currency rate from internet
- add user defined rate

Basically, this application does, tip calculation and currency converter, and plus alpha.
Besides, reading 'tip' as 'tax', you can calculate at shopping, and you will know total amount.
By adding user defined rates, you can convert inch to centi-meter, or other things.