It could be free.

Just add the Tapatalk plugin here and we should all be able to access the forum via the Tapatalk app perfectly. Simple to set up and easy for everyone to use.

You could also set up a script to recognise when people log into the forum with a mobile browser and link them to the Tapatalk app so they can browse easier.

Tapatalk Forum App - Empowering Forum Junkies on-the-go