Dekko on UBPorts PinePhone usable?

[firefox-58]

You can't install packages througth terminal, the filesystem is read only and using apt is not supported, you only can install apps from the openstore

I tried thunderbird and evolution on another pinephone with phosh:

Completely unusable . Most buttons outside of the screen und the fonts are so small that You cannot read them without an looking glass.

The only usable mail client so far I have seen was Geary-mobile on Manjaro

A lot of webapps on UT have also fonts and clickable elemenst so small, You can only use them with a toothpike and read them with a microsocope. Here Dekko is designed wonderful usable. But buggy like hell. Also phone reboots can be caused by Dekko