- Both the standard and Pro versions of Smile's PDF editing tool gain support for 128-bit and 256-bit AES encryption, as well as for Unicode passwords using 256-bit encryption. Standard: $60, Pro: $100.

- The iPhone version of PhatWare's text-editing app has been revved to version 5.1, bringing improved handwriting recognition, synchronization with Evernote, improved Dropbox syncing, and a new command to let users upload WritePad documents to Google Docs as text or PDF. $4.

- Algoriddim has updated its iPad DJ'ing app with features specifically tuned for the iPad 2, including the ability to change a song's tempo without affecting its pitch, better syncing and BPM detection, and auto-aligning to the closest percussion. The above features require the iPad 2, but the app also has better recording playback and minor improvements for all iPad models. $20.