Are you having an issue browsing the forum from your mobile?
The only real problem I have on LoyceMobile is that I have to scroll a bit from left to right to read posts. A bigger screen would solve that, unless the forum formatting could change a bit.
I don't think it's worth developing an app to offer the same features a webbrowser has already.
Agreed, I regularly browse and post on Bitcointalk on mobile, haven't come across any issues, except the scrolling from left to right. (though not really an issue IMO)
Then again, I usually browse other websites in desktop mode, so I'm probably somewhat weird in that regard.