RetroAchievements
7.9#1 in game achievement trackersFree planFree planAndroidiOSWebAPI
VisitRetroAchievements suits players who want achievement tracking, profiles, and friendly competition while playing supported retro games through compatible emulators. It also has options for developers using its public API and players willing to start sessions online.
Trophi fits gamers who track achievements, chase full completion, or create and follow guides. It currently centers on Steam account connections.