Retro Joy is your ideal companion app for RetroAchievements.org
With Retro Joy, your RetroAchievement.org achievements, friends, and games are brought straight to your device. You can even collect your favorite games in your library and organize them into collections, exclusive to Retro Joy.
If you are new to the RetroAchievements.org community, joining is as simple as downloading the app, creating an account, and logging in. The rest you can pick up along the way with pointers in the app, and the support of the community on RetroAchievements.org.