Go ahead and search the depths of the Earth with the iGills Smart Diving System for iPhone. It will turn you into a virtual marine biologist. As long as you have the waterproof case, the app will turn your phone into a smart dive computer.
It includes a number of awesome features, including camera, video, dive log, compass and an emergency flashlight. The advanced computer has extreme capabilities. As they say on their website, the app has "multiple diving modes including Air, Nitrox and Gauge [that] add to its versatility. iGills includes ascent rate indication, nitrogen loading tracking over multiple dives, low time and depth alarms, altitude compensation and more."
Every picture, video and information you record on the device can be easily transferred to all you favorite social media sites, so you can share your adventures with friends.