While taking measurements based upon pictures may not be ready for field use yet, the ability to mark up pictures with measurements and annotations using existing cell phone applications is a useful and important tool for the construction professional.  After a long day on the job site taking hundreds of pictures, it’s easy to forget exactly why or where a specific picture was taken.  The cell phone applications below will not only keep yourself from forgetting details about your photos, but will also help you effectively and clearly communicate to your co-workers and other contractors.