School app that shows countdown until the end of the class

Hi,
I need an app for school, something like a time-table that have a widget with countdown to the end of the class...

Ty

Your phone Clock app might already have a timer.

Do they not put clocks in classrooms anymore? Is there no bell to indicate when it's time to change classes?

While I want to help, unless you're a teacher I don't see much point or need for such an app. The classes end at the same times every day, don't they? On top of that, rather than watching a clock (if you're a student) shouldn't you be paying attention to the class material instead of your phone? Class is over when it's over. If I was a teacher and saw that activity, I'd ban phones in the classroom (aren't they anyway?). Yes, teachers SHOULD have the authority to ban phones in the classroom while they're trying to provide an education (but we won't start THAT discussion)