This is the "stealth" version of the LogicAll Solutions' MobileTracker. The app will run at device boot so no user intervention is required. Best for use on children's phones and people under your care ~ anyone else should be notified to prevent invasion of privacy. If the GPS on the device is disabled, the MobileTracker XS will still read the location based on LBS cell tower location. Not as good as GPS but if Granny wanders off you can at least tell what part of the city she's in. As soon as the GPS is turned on, the MobileTracker XS will switch back to uploading GPS coordinates.