UPDATE: Depth Gauge is no longer available. Check out Gas Manager on the App Store.
Version 1.0 of
Depth Gauge, an operating depth calculator for iPhone and iPod touch, has been released.
Aimed at technical divers,
Depth Gauge calculates Minimum Operating Depth, Maximum Operating Depth, and Equivalent Narcosis Depth1 for a specified breathing gas mixture and maximum partial pressure of oxygen2.