Unfortunately my favorite simple calculator, Operations, is no longer available for the iPad. Although, if you’ve downloaded it before it was removed from the App Store, you can still download it by clicking on the “Purchased” tab. Unfortunately, if you haven’t you’re out of luck. However, in my research to find a valid replacement of a free and ad-free simple calculator I stumbled upon MyScript Calculator. All other simple calculators were not ad-free or had to be paid for so this is my next recommendation. It’s different but I actually like how it works. There are no buttons like standard calculator apps. Instead you write your operation with your finger or stylus. MyScript effortlessly translates your handwriting and quickly calculates it right before your eyes.
MyScript supports the basic operations – addition, subtraction, multiplication, and division – as well as exponents, square roots, percentages, absolute values, trigonometry, constants (pi, e, phi…), logarithms, (quantities), and factorials! I tried to do cubed roots but it wouldn’t register correctly. I even tried raising a number to the 1/3 power to see if that would work but it didn’t. So there are improvements that can be made. Hopefully there will be an update for this. Therefore this is more than a simple calculator and is almost capable of being called a scientific calculator. However, for most calculations this app certainly does the trick.