## Multiple difficulty levels

Multiple difficulty levels

Choose between 4 difficulty level, from the easiest one - with one digits-number - to the most difficult one* - with four digits-number.

* May required paid-for Premium access

## As easy as writing on paper

As easy as writing on paper

Use a calculator-like keyboard. And get hints on where the next digit should be entered. The result? Exactly how writing on paper.

## Step by step calculations

Step by step calculations

Let the app split the calculation in easy to perform chunks - and then see how they will roll up in the main calculation.