To see how something changes over time and from all sides.
A device you place around the object you want to photograph, and that moves around it at a pace you control. You put your smartphone into the device, set the time lapse parameters (time, pace, movement tempo, etc.) in the app, and the device will move the smartphone around the object taking photographs from all angles, by the parameters you set.
It might be interesting to see if there are any patterns or similarities in subject matter and style of pictures taken by people of similar age, and what these are.
An app that crawls the social networks and gathers pictures of users that have their age available publicly. The app then creates an ever growing wall of pictures segmented by age groups.
Get ideas or avoid the clichés.
Point the app at what you want to photograph and see many other pictures taken by others already from different angles and in different styles. Flip through them to get ideas.