Photo enthusiast Makes Money on iPhone Apps called PhotoJot
PhotoJot, an iPhone-based note-taking system for photographers. The system allows photographers to enter summaries, text and even voice notes related to their images. They can include shutter, aperture and ISO values, and GPS or cellular-based location information.
The latest version also includes depth of field, exposure, flash and sunrise/sunset calculators and a “camera bag” feature that allows the user to associate a note with a particular piece of equipment. Of course, much of this information – particularly the technical stuff – is recorded anyway in the EXIF data, but PhotoJot does provide one central place where photographers can record all of their information.