I have Proplanner, which uses the same algorithm as the VR3. I also have V-Planner, which IMHO is a lot better to use, and very versatile. You can download it free from the internet, which gives you the ability to plan your dives. It is configurable, so you can also work out gas requirements based on your own RMV etc, which is a real bonus.
But there is also a lot more to it. If you blend, there is a whole section on blending He and EANx, but this isn't free. You have to buy a license, (about $45) which unlocks the goodies.
Well worth it!!
HTH
Steve
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