retroshelf is a play-tracking and discovery app for retro handheld players. It gives each player a public shelf for the games they are playing, finishing, reviewing, and replaying, with device context included. Instead of keeping notes scattered across handhelds, spreadsheets, Discord posts, and memory, retroshelf turns sessions into a browseable history: what you played, when you played it, how long you played, and which handheld you used.