PDF Expert 4.1 ($10) - Readdle has unveiled PDF Expert 4.1, an updated version of its PDF viewer and annotation tool for iOS devices. Features of the upgrade range from faster PDF rendering, to auto-sync functionality with DropBox. Support has also been added for Microsoft SkyDrive, and for recording audio notes into PDFs. [Download - 17.8MB]

CRC Pro-Cycling 1.0.1 ($3) - CRC Pro-Cycling is a new arcade-style racing game where players speed through city centres and rolling hills. Players can challenge computer-controlled competitors, or compete against friends via Bluetooth. Additionally, users can customize their cyclist's appearance with team jerseys and helmets. [Download - 97.7MB]

Polymer 2.0 ($2) - A major 2.0 upgrade of Polymer, the strategic shape-creating game for iPhone/iPad, is now available from the App Store. The latest version introduces a new multiplayer mode, along with iCloud syncing between devices, and changes to the Two Minute Mode that now include five and 10 minute variations. [Download - 45.4MB]

Air Video 2.4.11 ($3) - InMethod has announced an upgrade to its popular Air Video streaming app for iPhone and iPad, and iPod touch. With the new 2.4.11 update support has been added for the high-resolution Retina display, as well as for the ability to passthrough H.264 video streams on the iPad, iPhone 4 and iPhone 4S. [Download - 1.5MB]

Pocket Army 1.0.1 (free) - Help battle against evil forces in Pocket Army, the new real-time strategy game by Pine Entertainment. The game requires players to build and lead an army of swordsmen, archers, magicians, and other types of units. Players can compete against each-other online, or work towards completing dozens of quests. [Download - 43.5MB]