Tapatalk is a mobile forum app and supports iPhone / Android / Blackberry and Nokia.
Tapatalk supports all the usual forum functions plus full screen image viewing, image upload, caching (less reload), private messaging, all these features are accessible in just a few simple taps.
You can read all about it and download the correct app for your phone here http://www.tapatalk.com/mobile.php
Tapatalk for iPhone:
Showing New and Unread Posts:

Full Thread Viewing and Pagination Support:

See Who's Online:

Reply to Post and Image Upload:

Some of the large forums activated Tapatalk support

Tapatalk for Android
Total Android Look and Feel

Same feature set as iPhone:

Quickly Reply to a conversation:

Latest and Unread Posts indicator and multi-tabs support:

Full screen image support - support landscape mode also
