Catch up is the mobile application for real-time determining the location of your friends having a good time. This is something like “Let’s catch up!”. Properly speaking, the service would be easily named “Let’s booze!”. But we are decent people.
The geo-service makes it possible to invite your friends to a meeting point, and to see who messes around and where right now. You can change your status if you don’t want somebody (for example, your wife or girlfriend) could see where you are now and with whom.