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.
StreamTrackr suits streamers who want achievements and trophies displayed live across supported gaming platforms. Pro may suit those who want Twitch or Discord integrations and customized overlays.