SmartCalc is my first "proper" app, and I'm quite proud of it.
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The UI is split across three tabs (similar to brainfuck) but the app itself is totally different.
First Tab: Formulas
The first tab lists all your formulas, which are conveniently stored in a database on your phone. Here, you can save, modify and delete your formulas. If you select one, you will be flicked to the second tab, to enter the variables required for calculation. You can also long press...