F-Droid is a free and open source app store and software repository for Android, serving a similar function to the Google Play Store. The main repository, hosted by the project, contains only free and open source apps. Applications can be browsed, downloaded, and installed from the F-Droid website or client app without the need to register an account. "Anti-features" such as advertising, user tracking, or dependence on non-free software are flagged in app descriptions.