Sonos' recent app update, a colossal mistake in every significant category of measurement for the quality of experience design from human factors to stability and performances, had me ready to replace my entire Sonos setup [5 One, 4 Play:1, 2 Play:3, 2 Five, 1 Connect: Amp, 1 Connect, 2 Playbar, 1 Sub, 1 Boost] before I found this app. this app resolved the horrible Sonos stock app's massive data latency and responsiveness issues. Now, with this app adjusting volume, grouping speakers, starting to play, and so on, work the first time, typically with ms response times.