PCalc RPN Calculator 2.6 ($10) - PCalc RPN Calculator 2.6 is a new version of the fully-featured digital calculator for iPhone, iPad, and iPod touch devices. The update makes it possible to now add, edit, and export your own constants, as well as sync constants across other devices. Additionally, the app now support all functions from the Mac version. [Download - 4.9MB]

Notesy for Dropbox 2.1 ($5) - Notesy for Dropbox is designed as a note-taking and editing tool for iOS devices. The latest 2.1 version offers a variety of new and improved features, including passcode support, compatibility with RTF files, a rearranged toolbar, and enhancements to both the markdown interpreter and artwork. [Download - 13.3MB]

Veensta Camera 1.0 ($1) - Pro Apps Studio has recently announced Veensta Camera, a new photography tool for iPhone/iPad. The app currently offers 14 unique effects to choose from, along with eight different picture frames and multiple border colors. Also included is support for sharing pictures via Facebook or e-mail. [Download - 8.3MB]

Summoner Wars 1.0 (free) - A new digital card game is now available for iOS devices, called Summoner Wars. The free-to-play app from Playdek allows players to control the Phoenix Elves faction and battle against AI opponents. Through the game's in-app store players can add reinforcement card packs and purchase new races. [Download - 42.5MB]

Scanner Pro 4.1 ($7) - Scanner Pro 4.1 transforms your iPhone/iPad into portable scanners that can be used to scan everything from documents to business cards, and even receipts. With the new update the app now sports a re-designed user interface, as well as iCloud sync support for automatically syncing files across all devices. [Download - 16.9MB]