Calculator++

Calculator++ is an advanced, modern and easy to use scientific calculator #1.
Calculator++ is all you need - it helps you to do basic and advanced calculations on your mobile device.
Calculator++ is the modern calculator for everyone: scientists, accountants, students.
Features:
++ easy to use
+ no need to press equals button anymore - result is calculated on fly
+ smart cursor positioning
+ several kinds of brackets
+ copy/paste in one button
+ landscape/portrait orientations
++ drag buttons up or down to use special functions, operators etc
++ modern interface with possibility to choose themes (currently 3 themes available)
+ highlighting of expressions
+ history with all previous calculations and undo/redo buttons
++ variables and constants support (build-in and user defined)
++ complex number computations
+ support for lots of functions: sin, sinh, asin, asinh, ln, sqrt etc
+ open source
+ Russian and English interfaces

NOTE 1:
1. To use functions written on the button above and below the middle text (e.g.: sin, cos, and other) push the button and drag up or down lightly.

2. Long click to edit/remove variable, short click - to use
3. Click to use memory record
4. Click on calculators result to copy

NOTE 2:
Calculator++ is based on powerful framework for mathematical calculations and new releases will bring next features:
1. Symbolic computation
2. Differentiation/integration
3. Graphic plotting