Google Play
Use the Play listing linked from the app page. Play handles installation and updates for that copy.
Install
Open an app page, then use its Google Play or F-Droid link. Store listings handle installation and updates for their copies.
Fossify uses the same package name and signing key for its Google Play and F-Droid releases.
Install sources
Play and F-Droid publish independently, so release timing can differ.
Use the Play listing linked from the app page. Play handles installation and updates for that copy.
Use the F-Droid listing linked from the app page. F-Droid verifies and publishes releases on its own schedule.
GitHub provides source, tags, release notes, and issue history rather than managed app updates.
Released apps
Each app includes store availability, package name, release, source, and privacy details.
Changing stores
Fossify uses the same package name and signing key on Google Play and F-Droid. You can change stores without uninstalling when the destination offers the same or a newer version.