Included free is the Time Lapse option. This will take pictures based on a time interval.
In the settings you can set which camera to use (rear or front), the picture size, and the flash mode.
Optional modules include: (In App Purchase required)
EMF Trigger - Trigger the camera based on Electro-Magnetic Field values read from the phone's electronic compass sensor. Start and Stop values can be selected.
Vibration Trigger - Take pictures when ever your phone senses vibration above a certain setting.
Light Trigger - Trigger the camera whenever light values change. You can set it so a picture will be taken whenever a light is turned on.
Many more sensor modules will be available shortly.