I have to make an application where a "sender" can send a message to a group of people and to a location. So when a member of the group reach this place (using location position with the cell phone), he receives all the messages for this location. I have thought to make the application using the twitter API, but I'm not really sure if that functionality is possible.
I thought using twitter would be nice to manage groups and login... the application is written in c++ in QT, so, any ideas for the service to be used to manage messages?
Thank you!