An offline-first music app for social dancers, built to work in venues with no signal.
100%
Features available offline
0
Network calls to start playback
98
Lighthouse PWA score
Dancers and DJs need their music in basements, festival halls and studios — exactly the places where mobile data does not reach. A streaming-only app is useless the moment the connection drops mid-song, and the usual answer of downloading a whole library is too heavy for a phone.
I made offline the default rather than a fallback. The app is a PWA with a service worker that caches the interface shell on first visit and then lets users pin specific playlists for offline use, storing audio in the Cache API with a size budget they control. Playback state, queue position and newly created playlists are written locally and synchronised opportunistically whenever a connection reappears, so the app never blocks on the network.
The app works identically in airplane mode and on fibre. Users pin a night's playlist before they leave home and never think about connectivity again, which is exactly the point.
Selective caching with a user-controlled storage budget and clear per-playlist status.
Local writes queue up and reconcile automatically once the device is back online.
Full PWA install, lock-screen media controls and gapless queue playback.
BPM and count-in information surfaced per track, so dancers can pick by tempo.
Tell me what you are trying to build and I will tell you honestly what it takes to ship it.
