Foursquare, which hit the market with its check-in app that lets friends know where you at any given moment has become immensely popular, with millions of users worldwide. Now it has stiff competition from a brand new application called Forecast, which is getting a huge buzz.

Forecast has done Foursquare one better. It tells friends where you are going to be, not just where you are, as Foursquare does. So if you are going to hit the clubs one evening, you send a blast to friends using the application and let them know where you plan to be and at what time.

Tens of thousands of people are using it and roughly ten percent of its users are forecasting their whereabouts daily. To become a user you need to know someone already using the service.

“It’s a passive and open invitation for your friends to come join you,” says Rene Pinnell, co-founder and chief executive of Forecast.
“It’s much easier to meet someone two hours in the future rather than trying to drop everything and jump on the train to meet someone that you just saw check-in somewhere.”

Forecast’s main goal is to make it fun and easy for people to share where they are going. The company hopes to release a Forecast API, a sharing of the software code that will help generate an interactive community around the service.