Or simmiliar app in development?
on my mailcow test server its work out of the box.
maybe you can test it again?
problem with sogo and caldav is that iphone sync is broken.
Question is why?
Is it possible to activate ActiveSync?
IMAP + 2*DAV is way more work to activate than just one time ActiveSync per device
A missing puzzlepiece in cloudron is a good password manager.
This is the best one i can find.