• Lightweight (APK ~2MB)
• No unnecessary permissions
• Dark, Light, Amoled and Material You theme
• Scientific mode
• History
• Portrait and landscape orientation
• Quick Settings Tile
• More...

• Android 5.0+

Support OpenCalc development by donating money. Thank you very much for your help! ❤️

Join the Discord server!

Pull requests are welcome. For major changes, please open an issue first to discuss what you would like to change.

Please make sure to update tests as appropriate.

You can help translate OpenCalc on Hosted Weblate.

This project is licensed under GPLv3

OpenCalc doesn't use mXparser anymore since the v2.0.0 for two main reasons:

1. reason is that it allows much more freedom and flexibility. mXparser has many known problems, either with accuracy or with features not present. Creating your own implementation allows you to control everything.
2. reason is that it's lighter to use your own implementation (mXparser has around 3 times bigger size than OpenCalc).