Do I Have to Pay Them? You do not! Kivy is open source (MIT licensed), and does not require any payment , even if you end up making an app that generates money through sales or ads.
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Kivy is a free and open source Python framework for developing mobile apps and other multitouch application software with a natural user interface (NUI). It is distributed under the terms of the MIT License, and can run on Android, iOS, Linux, macOS, and Windows.
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