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How to find nearby iOS devices (GPS locations) using the same app

I want to create an application that allows the user to find the neighboring location of other users using the GPS coordinates that are included in the same application. You can also track the location of devices (recorded in a single application) that move in the car.

Can someone give me an overview of how I can do this. Is there a free API for this task?

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Danielbeard is right - you will need to constantly store / update locations on the server somewhere. Your application really gets some time to work when it is in the background, but I'm not sure that this will be enough to start the web traffic that you need.

Send a message: Running the application in the background and sending frequent HTTP requests

And see the multitasking guide here: Multitasking Tips

You can also see push notifications. Hope this helps.

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iOS7 MultiPeerConnectivity , , , , - , , , , .

http://nshipster.com/multipeer-connectivity/

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