I have tried[1] to allow students to have their phones, teach them to use their phones responsibly, etc. It doesn’t work. They are banned in my class.
I’m just a single teacher with basically no budget. I can’t compete with giant corporations that spend millions on design, UX, UI, etc.
[1] Also, technically trying to teach kids to use their phones responsibly (or even generically teaching them how to be responsible adults) isn’t legal state standard for any of my subjects so I could get yelled at by parents or admin for doing it and I would have no recourse. It’s unlikely to happen out, but it is something admin can use if they don’t like you and want to nail you on something.