MTB Tire Pressure play online

Visiting the site MTB Tech I saw a very good way to calculate the pressure for my MTB bike, so talking with its creator I replicated to Android.
The calculator takes its cue from a table appeared in October 2011 in the magazine Mountain Bike Action (Italian edition). The article listed the average pressure and some changes to be made depending on ground conditions or the ability of the pilot.
In order to make the calculation easier we thought we would provide a more simple and immediate service by creating this little website available to all cycling enthusiasts.The calculated pressures are approximate and serve as a basis for further refinements.