Cartoon Network
The catch is that you don't know which Pokémon are going to appear where at any given time. The "Pokémon GO" app gives you clues with a Nearby tab and subtle animations in the game's map view, but that's it. You have no way of knowing where exactly the Pokémon you're looking for is and how long it will be there.
Until now.
A website called PokéVision shows exactly where Pokémon are currently spawning in Google Maps, including the time left before they disappear.
It's like having a treasure map to every Pokémon in the game, and yes, it works. Here's how to use it: