Calculators can be useful at any time and in any place – in the store, at work, while studying or even doing hobbies, but it is not always at hand, and if it is, it lacks a lot of necessary functions. This calculator can be called the most functional and convenient. With its help, you can calculate the entire expression at once, you can calculate trigonometric expressions. There is also a mode for calculating in binary, octal and hexadecimal systems. You can add comments to each example and save them. The latest version of the app for studying Mobi Calculator FREE download for android.