ExtCalc is an innovative scientific calculator that makes operating computations easy. It shows your whole formula in a text view. You can have different calculation sheets for different formulas or you just use one sheet for all your formulas. Deletion and memorizing results are integrated as well. Last, but not least, it includes a customizable constants pool.

All nifty features in a short list:
* individual calculation sheets
* memorizing results, e.g. via the ANS button
* many functions, even in portrait mode
* grouping (brackets)
* error proof, you can't input formulas that would lead to errors
* constants pool, easily customizable
* easy interaction

This program is brought to you by Develicious Studios Weber.