I am looking for an application similar to "Digital Wellbeing" for Android. I want it to show activity (hours/minutes) per day (maybe even per used application). Usecase is in a big school with hundreds of computers. Goal is to increase awareness of screentime in K12. The statistics don't need to be centralized / in the cloud. It would even be better if the app was local only. Any suggestions?

I am looking for a app which allows you to watch your camera but with a delay.

Usecase: Film myself while training and watching the screen a few seconds later shows me what I did.

Bonuspoints for free/open/libre apps...

I need my work emails on my mobile. They only work with Exchange/Activesync. IMAP is not an option. Is there a good, privacy respecting app for Android out there? I would like if I could use the same app for my other E-Mails which all use IMAP. I now use Gmail, but I hate the unnecessary connection with the big G. I'd also prefer not to use Outlook (mobile) because it (might) send your credentials to MS.