Waste of space in RAM

At first I thought this app is great for students of the fifth / sixth classes, learn fractions ...
Probably not: the three-digit blocks for integer, numerator, denominator make the entry of fractures actually minimal easier than with a conventional calculator, where you have to press twice the "break" button.
BUT: the app can not even really good Bruchrechnen (no point before line, no clips, no "reverse" conversion of mixed in pure fraction), and moreover, they can not - it does not even have (like a-buy computer from rummage) a memory button.
So once something to be expected, which goes beyond simple fractions, must ere another app ran - and has only a numeric keypad.
So do not touch - at least when this masterpiece (which looks really nice image) no longer "Free App of the Day" is.