LexVid

The viewers are lawyers watching accredited courses, often without a connection. Offline was not a feature request, it was the product: download a series, keep the progress, play it back with nothing available, and have the app agree with the server the next time it sees one.

React Query with an async-storage persister holds server state across cold starts, so the library paints instantly from cache and reconciles in the background instead of showing a spinner on every launch. Credits, certificates and playlists all reconcile the same way.