The app store that specializes in free and open-source Android apps is F-Droid.
F-Droid is both an Android client application and a software repository. Its main repository contains apps whose source code is available under free and open-source licenses, distinguishing it from stores that primarily distribute proprietary software. Users can browse the catalog, download APK files, and install apps without creating an account.
The project also emphasizes transparency and user control. App listings can identify “anti-features,” such as advertising, tracking, or dependence on non-free services. F-Droid’s tools and repository software are themselves open source, and organizations or individuals can create additional compatible repositories.
A common mix-up is treating F-Droid as simply another Google Play alternative with the same catalog. Many popular commercial apps are absent because they contain proprietary code or do not meet F-Droid’s inclusion policies. SlideME, GetJar, and Aptoide are alternative Android marketplaces, but they are not defined specifically by a free-and-open-source-only focus. F-Droid is also not normally installed through Google Play; its client is obtained from the project’s website.