There are some such app, but most of them relatively poor experience, So we decided to make one for Pokemon Go ourselves.
In this app, you can post information in the map, nearby players will see your information, and perhaps he will give you a message, to discuss the fun of the game.
Similarly, you can see the nearby trainer publish information and contact him. His release may be the position pokemon appear, perhaps joy when caught pokemon.
NOTE: We are not affiliated with Niantic Labs or the Pokemon company or with the game itself but we like them a lot and hope our chat app makes their game play even better.
GoChat does not use your Pokemon account info in any way. We never contact the Pokemon Go servers using your device or account information. Other apps may do that and it could lead to getting banned from the game.