Android port of the Snapcast client: https://github.com/badaix/snapcast
This App is not meant for productive use and will only run when you have a Snapserver installed in your local network.

Snapcast is a multi-room client-server audio player, where all clients are time synchronized with the server to play perfectly synced audio. It's not a standalone player, but an extension that turns your existing audio player into a Sonos-like multi-room solution.