Set one up as a test to see how incredibly useful they can be! This app also includes an sos system we call gpsos which will alert people by text message or email that youre in trouble, and also give them a link to a map so they can find you. Install the Http://www.defactosolutions.co.uk/language/whatsapp/text-Spying-Free.html app from the play store. Click on the gps tracker icon on your device (it looks like a little map with a purple marker on it). In the app click on the instructions button, and youll see the link to be used, and your special key for tracking your location.