Calculator includes all the usual operations.

Key features:
- Small size;
- Suitable for any screen and resolution;
- Easy to use;
- Tap to copy, long tap to insert the results;
- Short operation ( "3x =" -> "9", "3 + =" -> "6", "3xx" -> "9", "3 ++" -> "6" and others);
- Trigonometric functions (cos, sin, tan, sinh, cosh, tanh) and backward power of them;
- Operation "Cancel" and "Repeat" (undo and redo previous actions);
- Save to memory and from memory, add and subtract operations;
- History, pull down to display;
- Additional operations are caused by long tap;
- Button "?" - enables help mode (tap and long tap for operations describe);
- Additional window for pre-results;
- Many other features ..