I think this is the best option for access to Gmail accounts on the Kompakt. Unlike @Sylvia99 I’ve had zero authentication issues. Smooth sailing and a good, minimal layout. Not specifically designed for e-readers, but very nice.
If you’re experiencing the same issue I had, where the compose email icon either wasn’t visible or would appear and disappear, I found a solution.
Go to Settings → Appearance and disable the floating compose button option. Once I did that, the pencil icon for composing new emails became permanently visible at the top of the screen.
I’ve attached a few screenshots for reference, and I hope this tip helps anyone else who runs into the same problem.