CalculatorBox HD App for iPad
"Four orientations of screen, Four Calculators!
An ultimate All-In-One calculator for iPad. Absolutely different from other calculators you see in App Store.
Yes, it's an All IN ONE calculator. Just rotate your iPad and you will get four calculators:
Simply rotate your iPad to switch between different modes.
- keyboard sound & mute option.
- copy & paste function.
- Save status on exit.
- Big buttons, easy to use.
- Backspace by swiping over the display"
This app costs $1.99