Calc3 is a beautiful simple tape calculator for your iPhone with a uniq user interface.
Now available in the Appstore.
New in 3.x:
universal App for your iPhone and iPadmore keys on bigger screens (iPhone 6 and iPad)
new themes
iPad Pro support
Slide Over and Split View support
Landscape mode for iPhone
Features:
basic calculationlots of sientific funtions
decimal, hexadecimal, binary and octal conversion and calculations
currency conversion
uniq and easy percentage concept
unit conversions
customizable function keys
scrollable calculation history
calculation history can be shared
adjustable key click sound volume
8 themes