I'm not sure what software stack these forums run on but does it not have a mode for viewing on a mobile phone?

I don't normally use my mobile for browsing but happened to do so over the Xmas period and I basically got the full desktop view scaled down to fit my phone's screen.

I'm not interested in Tapatalk, I run a forum using PHPBB software and was looking at setting it up for users and came across quite a few serious issues (security, privacy among others) that I didn't bother.