Email norification on new beta version

Is there a way to get notified when a new beta version gets installed automatically on my phone? It would be quite useful, because if something doesn’t work, or I cannot find a function/option/feature I will not assume automatically that I am loosing my mind.

Not sure if it is what you had in mind but in K9 you could enable to see Changelog after an update when app is started:
Settings / About / Version field
There you see the changes for current and last versions. And also at button you can enable “Show recent changes when app was updated”

Edit: Just got an update of K9. Showed a footer to see the release notes. I thought it will display fullscreen immediately. But at least you get footer.