- Version 3.4 of Global Delight's iPhone camera utility adds 21 new photo filters, 9 distortion filters, a before-and-after preview, the option for gird lines in Burst Mode and Video Recording Mode, white-balance lock, and some minor UI refinements and bug fixes. $2.

- The latest update to the video-streaming service's iOS client adds support for subtitles and for iOS 4.3.3 and 4.2.8. Free.

- The social-networking client revs to version 2.1, bringing multi-window support; autocomplete for usernames and hashtags; new designs for windows, user profiles, and conversations; AppleScript support; font size preferences; and a host of performance improvements, enhancements, and bug fixes. Free.

- IK Multimedia has updated its iOS mobile recording studio app to version 2.2, adding five vocal effects from VocaLive, available via in-app purchase; an enhanced system to manage and favorite presets; and a vocal and solo eliminator in the Speed Trainer system. $20 for iPhone or ; free version for or ; $3 .