
V-Planner is a decompression program that uses the Varying Permeability Model (VPM-B) for decompression profiles. The VPM-B decompression model is well suited to today's technical diving. The deco profiles will start deeper than traditional models, accounting for micro bubble growth and controlling this, giving a better overall decompression.
We would recommend
Bubble models and similar deep stop profiles, have become the standard for technical and deep diving, with many training agencies including bubble models into thier courses. The VPM bubble model uses math to simulate and measure micro bubble growth, and set limits accordingly. The output of a bubble model is remarkably similar to many established deep practices such as Pyle Stops, Pearl divers, Florida cave practices and others. At the recent Deep Stops Workshop, presentations from Comex and USN researchers among others, showed that the bubble model style profile is the preferred approach to decompression.
While the below are excellent reference materials, in no way should this information or software or a dive computer manual be considered a replacement for proper training for the specific type of diving in which you plan to participate.
Check out these great Iphone Apps 
It is important to understand that no decompression procedure, software, table, or dive computer exists which can guarantee that Decompression Sickness (DCS) will not occur. It is possible for DCS to occur as a result of both "no decompression" as well as "planned decompression" dives. The only way to completely avoid the risk of DCS is to not dive.
Before undertaking any dives involving planned decompression or mixed gas it is necessary to gain further training and experience in these areas.
For suspected DCS Outside the U.K. contact the Divers Alert Network