A Multitasking Calculator for iPad & iPhone.
When you rotate your iPad, Calculator EX would change to 4 mode:
– Simple mode
– 2x mode (You can operate 2 calculators at once)
– 4x mode
– opposed mode
If you only want to use one mode, you could just need to rotate the device to select which mode you like, then lock the Rotation.
Enjoy it :D.