android-calculatorpp/README.md

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# Calculator++
Scientific calculator with sleek interface and powerful capabilities.
[<img src="https://play.google.com/intl/en_us/badges/images/generic/en_badge_web_generic.png"
alt="Get it on Google Play"
height="70">](https://play.google.com/store/apps/details?id=org.solovyev.android.calculator)
[<img src="https://fdroid.gitlab.io/artwork/badge/get-it-on.png"
alt="Get it on F-Droid"
height="70">](https://f-droid.org/en/packages/org.solovyev.android.calculator/)
![Demo how the app looks like](https://raw.githubusercontent.com/Bubu/android-calculatorpp/master/assets/intro.png "An image showing three phone screens, each showing one view of the calculator app")
★ Save your time!
* Access additional features from the main screen of the app using gestures. For example, to use «%» slide button «/» up
* You don't need to press «=» anymore - result is calculated automatically
* Copy/paste with a single button press
* App supports both portrait and landscape screen orientations
★ Personalize!
* C++ has two layouts: standard and engineer. Choose one which suits you best either from the initial wizard or from the application settings
* Set theme you like
* Add home screen widget
★ Do calculations without switching between the apps!
Calculator++ can work in a separate window floating over other applications on your phone
★ Calculate percentages, square roots, powers, trigonometric functions!
Calculator has a big variety of built-in functions and supports adding new user-defined functions
★ Plot 2D and 3D graphs!
Several functions can be plotted simultaneously
★ Use powerful mathematical capabilities of the app:
* Do calculations with variables and constants
* Use built-in functions or add your own
* Integrate and differentiate
* Do calculations with fractions and simplify expressions
* Do calculations with complex numbers
## License
This project is licensed under [Apache License 2.0](https://www.apache.org/licenses/LICENSE-2.0).
The license of this repo was added based on [the comment of the original author (Sergey Solovyev)](https://github.com/serso/android-calculatorpp/issues/184#issuecomment-317447082) on 2017-07-24 in which he wrote:
> The project uses Apache License, Version 2.0 (see source files for example). Unfortunately, I didn't have time to declare the licence in a proper way
The LICENSE file of this repo is [what Apache.org provides in text format](https://www.apache.org/licenses/LICENSE-2.0.txt). The only modification made was changing the name from `LICENSE-2.0.txt` to `LICENSE`.