Try the link below for Tapatalk Pro on Android handsets:
Tapatalk Forum App (Pro) Free Android App
It is totally free, and allows you to post, edit, etc, and all the other functions that you can do on a forum site, as long as the site in question is Tapatalk compatible - as this one is.
I couldn't find a version for an Iphone, sorry, but have a look on the mobile24 website, and see if you can get a version for your own handset.