Hi HN, I made Crosstune because people kept sending me music links for services I don't use.

Tap a Spotify, Apple Music, Deezer, TIDAL or YouTube Music link and it opens the same song, album or playlist in the app you actually use. No backend, account or tracking: it reads the title and artist from the link and searches your app for it.

It also does synced lyrics (they can float over other apps), song recognition, and MilkDrop visuals.

Open source, Android 8+. Feedback welcome, especially links it gets wrong.