It's camera application to particular about composition.
This application can display the grid which is useful to decide composition on a preview.
Grid can customize from an more option.
This application can change it at the time of photography quickly, if you create a grid beforehand.
other convenience functions.
self-timer (2/5/10 sec) and fixed point observation.
The "touch shot" to can photograph by touching a preview screen.
The "manual mode" that can set location of measurement of a focus and the exposure individually. *1
Change of photographing camera.(back/front)*2
White balance lock function.
Flash (OFF/ON/Auto) *3.
GPS function (ON/OFF is possible)
A function to rotate an image with an acceleration sensor, and lock function.
A option to insert comment and copyright in meta data.
*1 unsupported iPod touch 4th.
*2 supported iPhone4 and iPod touch 4th.
*3 supported iPhone4.