I am building a private location-based social network, so it would be great if people could be checked in automatically when they arrive. Is there anyway of doing this on iOS? What about Android?
On iPhones, there is an option to have a reminder about something when you arrive in a particular location so I guess the iPhone is capable, but I don't know whether it's a public API.
On ios you could use startMonitoringForRegion: in CLLocationManager, which should detect boundary crossing of a specified region, and even relaunch your app if it isn't running at the time