Spencer York performs “Suffer Through” with Movements at the Masquerade while on tour with Knocked Loose (2022). Spencer York's RU-vid Channel: / @spreeencer
The app he switched to looked to be a remote mixing app to adjust his in ear mix. It's really common for small and even sometimes bigger gigs to not have a monitor sound guy/girl and have every musician do the in ear mixes themselves. The main app he is on is most likely a song sheet or notes. Might also be the setlist, but most likely not because that wouldn't require a tablet...tablet comes in handy if you have to flip pages a lot (for example of you have a sheet for every song) and setlists are usually only one page
Not sure if you’re saying “sick” 🤙🏼 or physically sick here. He did say he lost his voice about three shows before this one though. He was still recovering. I think he sounds great considering that.