How to Use Location Services on iPod Touch
Perhaps nothing is more personal than your physical location. With Location Services on your iPod touch, apps like Maps (and lots of third-party apps like Google Earth, SkyOrb, Eventful, Foursquare, and various travel apps) can grab this physical location information and use it to help you find things closer to you.
For example, the Maps app can find your location on the map, which is very useful for getting directions. The Camera app adds location information to each photo or video you shoot, which is very useful when browsing pictures using the Places icon in the Photos app.
An iPod touch can find itself in the physical world by leveraging the most extensive Wi-Fi reference database in the world. You need to be connected to Wi-Fi to use Location Services on an iPod touch.
You can turn Location Services on or off by choosing Settings→Privacy→Location Services from the Home screen, and then tapping the Off button for Location Services at the top of the screen to turn it on or tapping the On button to turn it off.
The Location Services setting at the top of the screen turns on the services for all apps. You can also decide which apps can use Location Services.
Each app you used that requested your location within the last 24 hours appears in the Location Services screen, showing whether Location Services has been turned on or off for that app. Tap the On button for each app to turn it off for that app.
A purple icon appears next to any app that has recently used your location, or a gray icon appears if the app used your location within the last 24 hours. An outlined icon appears if the app uses geofencing — a virtual perimeter around a location that provides the app (such as Reminders) with a way to notify you when you arrive at or leave the location.
Turn Location Services off if you are not using apps that make use of it, to conserve battery power or maintain privacy about your location. After turning it off, your iPod touch prompts you to turn it back on if you run an app that makes use of Location Services (such as Maps).