Provided herein are methods and systems relating to location-based services such as providing a geofencing, outputting location-based information on a mobile device, varying transmissions to and from a mobile device, and providing location-based alerts. More specifically, a method can include receiving data defining a geofence, monitoring a current location, comparing the current location with the geofence, determining that the current location is within the geofence, and in response altering the state of an application on the mobile device.