This software still doesn't come standard with a theme that's useful for tablets and phones in the year 2018, so I'm trying some things out. Today I installed a theme that mimics iOS, and adds some of the functionality of that. I don't know if that actually works, I don't have any Apple stuff and haven't ever used it.
You may have noticed it today, as it seems to pop up by default with a link at the bottom to go back to the usual theme. I'll keep looking for something that's useful and not an eyesore.