Festify

Yes, you need Spotify Premium to use Festify. Third-party apps like Festify can only access Spotify's music catalog through Premium accounts, which is a limitation from Spotify.

Festify supports playback in Google Chrome and Firefox on desktop devices. On Android, playback works if you open Festify in Desktop Mode. Safari and other browsers on iOS are not supported due to DRM restrictions.

Not yet. Festify is still working on integrating Spotify Connect, but it is not stable enough for release at this time.

No, Festify currently does not support crossfading because the Spotify Web Playback SDK, which Festify uses, does not support this feature. However, once Festify supports Spotify Connect playback, you may be able to control crossfades through the Spotify Desktop app.

You can report bugs or ask questions by emailing mail@festify.rocks, creating an issue on their GitHub project, or tweeting @GetFestify. The team aims to respond to each request as quickly as possible.

Currently, Festify only supports Spotify. The team plans to add support for other music providers in the future, but there are no precise plans yet due to the significant work required for integration.

The Festify team is interested in adding Sonos support and has applied for Sonos's closed beta developer platform. They are awaiting a response and hope to provide Sonos functionality once the platform is available.