Pokevision is a Pokemon tracker/locator for the portable diversion Pokemon Go. It utilizes the Niantic API to get the area of all Pokemon close to your (or your chose area) and show them on the guide continuously; this implies in the event that it is shown on the guide, you can go out and get them!
Note: Rarer pokemon have a shorter appearance time so they may despawn; make a point to be brisk and watch out for their clocks!
However, now the application has been disabled you cannot find it anywhere other than the apk version and for now, that is also not working. You cannot find any maps on the application