Teacher here. I have my laptop (16”) and an ultra wide (34”) on my desk, and a projector behind me. I keep my email, attendance, and calendar on the laptop screen.
On the ultra wide, I keep my grade books and various spreadsheets, since more width makes it easier to see more data, and I have my daily agendas/lesson plans. Again, more width makes it easier to see the whole week at once. I keep that fixed to 2/3rds width of the screen, and the other side is reserved for Spotify at like 1/6th width
The projector is used to show the daily agenda, videos, instructions, etc. I very frequently screencast my iPad to the projector, so I can fill out worksheets on it with the class and they can see me write or circle things.
I can’t even fathom having any less screen real estate now. I gotta be able to see it all at once!
To clarify, it does still work just fine without the app. You can turn it on and off and change the temp without the app. We’ve been using an older version for years without the app and it’s great.
The subscription is super dumb though, not debating that.