Nice PC port
Ive been using CalcTape on Windows PC for about five years and think its absolutely fantastic. I paid $7.99 for it. Im pleased to find that its also available for iOS. The iOS version auto saves your entries whereas the PC version must be saved manually.
However, this port loses a star because its a bit clumsy to use. The keyboard button should not move when a redo is possible. All icons should remain fixed. I think more could be done to reduce the amount of space the menu bar and file title bar uses. I know it may be challenging given the very limited space on the iPhone 4 screens but its not impossible IMO.
I also think that when selecting a file the keypad should not automatically appear.
The keypad/keyboard toggle should behave like most toggle switches in iPhone apps. In this app you have to press 123 or ABC to select one or the other. For example, if you press 123 and the 10 keypad is already selected then it will not switch to the keyboard as you might expect.
I might appear to be very picky, but its just that Ive become so accustomed to the PC version.
Ahikanana about
CalcTape Paper Tape Calculator