Can vouch for colemak being hard to type correctly with on a phone. Normally with qwerty I felt I didn't rely so much on autocorrect, but with Colemak I make certain mistakes quite frequently. Especially given eio are all next to each other a lot of times when I want to type o I type "i" instead. I think it's gotten better in recent months but certain combinations on Colemak just seem to be very sub optimal for a phone. Especially the placing of the vowels.

I'm used to it now and it doesn't quite bother me enough to relearn qwerty on mobile. Kinda stuck in this weird limbo of relying on autocorrect for every 5th word. Hahaha.