Significant Change Notifications
After a location has been acquired by the app, Apple strongly recommends stopping location updates to preserve battery life. If the app does not require a constant, accurate location, then monitoring for significant location changes can provide an efficient way of informing the app when the device has moved without consuming a lot of power to keep the GPS and Wi-Fi monitoring the current location.
[self.locationManager startMonitoringSignificantLocationChanges];
Typically, a notification is generated when the device has moved at least 500 meters, or has changed cell towers. Notifications are not sent unless at least five minutes has elapsed since the last notification. Location update ...
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