Hidenori Matsuoka recently released version 3.0 of Guitar Kit for iOS, an app for searching guitar chord forms.

New in Guitar Kit 3:

• Support Left Hand Mode for all fret view.
• Added Scale Tab that contains many popular scales fret position.
• You can now slide decided chord form to left or right at Make Tab. (ex. Cm7 -> C#m7).
• If chord form you create is already existing, display "Existing" at Make Tab.
• Sound engine now works more efficiently.
• Fix problem don't save a part of setting.
• Fix issue about playing D6 sound.

Guitar Kit 3 costs $3.99 but is available for the introductory price of $0.99. The update is free to Guitar Kit owners.

UPDATE 28 September 2011: A quick version 3.0.1 update adds more reliable iTunes File Sharing support.