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.
If you dont mind using Firefox as your mobile browser (and youre using Android), there is an extension that formats the forum to fill the whole screen (as if it was responsible).
https://bitcointalk.org/index.php?topic=4500633.0