My organization is using the Collector App to catalog the current condition of roads, trails, signs and other infrastructure on State Natural Area Preserves. For many things, like signs, that do not change frequently it's helpful to have a photo attachment showing the current condition and text of a sign. We are just now beginning to catalog our infrastructure and have already realized that it would be helpful to have the ability to include a time/date stamp on the photo itself or embedded in the naming scheme of the photo. Several years from now, it will be helpful to know whether or not the photo is current or outdated.
Other areas where this could be useful are when taking photo-monitoring reports over a period of time. Having photos taken from the same location and time/date stamped would be very beneficial to see the change over time.
This idea has been marked as a duplicate of Add option to Date-Time stamp photo attachments in Collector by Scott Prindle. Please consider voting on this idea.