Tapatalk is a mobile forum app for iPhone / Android and soon to be on Blackberry and Nokia. Tapatalk supports vBulletin (3.x and 4.x) and phpBB forums and forum owner can activate this service for free. 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. Tapatalk for iPhone: Showing New and Unread Posts: