title: How to restrict an app if it's used outside the defined Google maps position
body: <p>I have an app that I created. The issue now is that I want the app to throw an error if the person is using it outside the defined GPS location. Say for instance I have defined my house as the only location where one can use the app. If the person is using the app maybe 100m away from the house it should notify him that he is out of range.</p>
  
  <p>Thanks in advance</p>