That's not the iOS or Android app. Confusingly, they (who's they, not 100% clear) publish proprietaryread-only apps for mobile which are not the same as the main Musescore. Also, the playback at Musescore.com uses some proprietary web tools (built on FLO ones in part I think) which are themselves separate from Musescore the main software.
app4soft|5 years ago
[0] https://github.com/musescore/MuseScore/issues
quadrangle|5 years ago