Ignore some review, it works well. :) – Ask MathStudio Review

Please, allow to edit previously entered calculations! And remove the "see in the other app" link in the middle of the screen! Thanks. I usually don't write many reviews but, after reading some of the comments, I downloaded the app to try it (today is free with an offer). Yes, it has predetermined questions organized by argument, but they're there to show you how app work. You can edit them with your values, create your own and save them to use later. I don't like the link to the other app in the first page, it's always in the middle of my business, I hope they'll add a way to hide it. For the rest it's a good app so far.
Review by Steven Campbell on Ask MathStudio.