The application itself works in a fairly simple matter, you sign in with your facebook account and your profile picture will be used as your in-app picture to display to other users'
Once you're in the app you get matched with people who are close to your geographical location. If you'd like to know more about someone swipe them to the right, if not swipe them to the left. If you swipe someone to the left they will not receive a notification that tells them that you have.
If you have both swiped/liked or caught each other as we like to call it you will be able to send private messages to each other and get to know each other better.
This app is commonly referred to as PokeDating, Poke-Dating, or Poke-dates, although the official name is actually Pokematch.
You will either meet many great new friends or perhaps even your special new Brock or Misty ;)
So this application can be used for dating, getting a friend or simply finding other members in your team. You can also find people based on your specific team to hang out.