It is not your usual entry by entry calculator. - Write your equations as you want, you can even skip unneeded operands, like you do on paper, all the below are valid entries: - 3sin(2π) - 5e^3 - 2√9 - (3sin(2π) + 2√9 ) log(100) - Ability to combine both radians and degrees in same equation like : sin(90°)+cos(π) . only add the degree symbol " ° " and that's it. no separate modes for degrees and radians. you can even get the radian equivalent easily like that 45°= and the result will be the radian angle. - Full history of all your previous calculations. - Percentage button acts like real calculators, very helpful in financial calculations. - you can go back to any point of your previous calculations and modify it. - Ability to copy full equation or result only and paste it later in other apps like emails. - Ability to copy result from history and paste it into new calculation. - Advanced Mathematical/Scientific functions are supported. - 2 Modes: simple and scientific. select whatever suits your need. - Many pretty themes to select from, your calculator will look different everyday, and will match your style. - Compatible with All iOS devices supporting iOS7 & 8 , with all different sizes. Download NOW! and enjoy the best calculator app ever on iPhone & iPad.