Deep Cut Atlas

Streaming solved discovery of artists and then stopped. The algorithm hands you a new name, you save two songs, and the other nine albums that artist made stay invisible. Deep Cut Atlas starts where the algorithm leaves off: it takes the artists already in your Apple Music library and maps their entire catalog - every album, EP, single, and compilation - against the tracks you actually own, then shows you only what's missing.

The Discover feed is that gap, browsable and filterable by release type. Anything that looks worth a listen goes into a real Apple Music playlist called "To Check Out" with one tap - not another in-app queue you'll forget, but a normal playlist synced through your own account. Anything that isn't gets dismissed once and never comes back. A History tab catches the other direction: songs you half-heard on playlists or radio can be traced back to their album and queued from there.

Everything runs on-device with read-only access to your library. There's no Deep Cut Atlas account, no server holding your listening data, and no recommendation engine - the app never guesses what you might like, it just shows you what you're missing from artists you already chose. The core app is free; a one-time Pro unlock (no subscription) adds extras like iCloud sync for the not-interested list.

Deep Cut Atlas is built in SwiftUI on MusicKit by Imperfect Systems, the one-person studio of Victor Da Luz in Costa Rica, and developed in public on the studio's dev log.