F-Droid

A catalogue and package repository for free and open-source Android applications, used as an alternative to Google Play, with every app built and signed from publicly auditable source code. Accessibility researchers frequently use F-Droid as a target ecosystem for studies and automated testing because its apps have public GitHub repositories, making it possible to file real issues with maintainers and track whether accessibility defects are fixed. F-Droid also enforces certain anti-feature disclosures (e.g., ads, trackers, non-free dependencies), which can influence which apps are suitable for accessibility evaluation.