I recently downloaded AIR DEPTH, a simple and useful app for the iPOD TOUCH and iPHONE.
The free application allows to calculate MOD, BEST MIX, EAD etc. for Nitrox.
Functions are self-explanatory and it is very handy during classes or when preparing a dive.
The 0.99US$ full Version “DEPTH GAUGE” includes Helium and makes it suitable for the far more advanced diver.
If you want to download the app you will find it here: