The Massive Dev Chart for iPhone/iPod Touch
Developed by Martin Man, this is a full-featured application with a multiphase timer which provides a graphical and numeric countdown of all the steps needed to go through development, stop bath, fixing and final rinse. Data from the Massive Dev Chart provides built-in development times which, along with all other processing steps, are fully user-configurable and can be saved as favorites to provide maximum convenience.
Available from the Apple iTunes store
or search for "Massive Dev Chart" on your iPhone/iPod Touch