Even better, Shelly. Their devices have optional cloud connectivity, but also have a local API. they’re compatible with home assistant and their bluetooth sensors use the BTHome standard, which works beautifully with home assistant as well.

Indeed, just let them be responsible for waking up on time. If they wake up late, the consequences are for them. Don’t want the offered solution, find your own, it’s not my problem if you’re late for school/whatever.