microG is a powerful tool for users who want to minimize their reliance on proprietary Google services while maintaining app functionality. By following this guide, you can understand more about microG installed on your Android device. Free implementation of Play Services. Contribute to microg /GmsCore development by creating an account on GitHub . In a nutshell, microG is a free and open-source alternative to the set of proprietary libraries that Google provides to be able to use Google Play Services on Android devices. microG Services (GmsCore) is an open-source alternative to Google Play Services that allows you to run Google apps on devices that don't come with these services pre-installed.