I'm looking for an app (android) that send my location to a server for processing.
Basically I want to write a server that does stuff when I get to certain locations, but I don't want to write an app myself.
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You could give IFTTT If this then that, a go - it is an Android/iOS app that lets you construct or download "recipes" that tell your phone to perform specific actions based on events such as entering or leaving in a specific location.
The App is free from the Play Store but you might, of course, incur data charges from your phone company.