Portfolio mobile Pro 2.9.4 ($10) - Portfolio mobile is a stock tracking app that includes support for more than 6 online quote sources. Version 2.9.4 adds a market cap to Yahoo, Google, and Euronext quotes, and now includes quotes from Boerse Frankfurt. A new broker setup is also used when adding portfolios, and a new internal operations architecture is used for value/performance calculations. [Download - 6.1MB]

Air Display 1.7 ($10) - Air Display turns an iOS device into a wireless display that can be used with both Mac and Windows computers. In addition to acting as a wireless screen extender, Air Display also allows the device to be used as a tablet input device. The v1.7 update adds support for both iOS 6 and the iPhone 5. [Download - 13.6MB]

djay 1.6 ($20) - djay is an iPad app that simulates a DJ rig, complete with beat and tempo matching, cue point triggers, two turntables, and pre-cueing with headphones. The latest release includes an integrated iTunes Store with in-app browsing, previews, and purchasing, as well as support for multi-route audio on iOS 6. The speed slider has also been improved and allows for fine adjustments by swiping above and below the knob. [Download - 32.3MB]

Doodle Jump HD 3.0 ($3) - Doodle Jump HD is a game where players must guide their character up through levels by jumping from platform to platform. As the level progresses the platforms begin to move and various monsters begin to appear. Version 3.0 introduces a new ninja theme that goes beyond a simple skin for the game. Throughout each level players can collect coins and exchange them for outfits that have different special abilities. [Download - 32.4MB]

Blogstand 1.2 (free) - Blogstand is a tool for reading, flowing, and discussing content on a variety of blogs. All content within the app is optimized for reading on iOS devices, and can easily be shared with others across Facebook and Twitter. The latest release improves overall performance and adds the ability to search through the entire blog directory with keywords. [Download - 14.6MB]