Just arrived to Google; new, free application for WOT players.
Application contains all World of Tanks vehicles displays as a 3D models with information about the armour thickness and effective armour.
For version 0.8.5.
Easy to use: just touch needed part of vehicle and see how thick armour is in highlighted place.
The arrow indicates the point of intake and the angle of impact projectile.
A red arrow means the ricochet.
Screenshot option is available so you can share photos with other players.
Its work fast and does not need a lot of memory space in your phone.
Have a look, please