Spot, XtaX and our servers use an old school fee for service business model. The tracking app, Spot, is itself free. If you wish us to certify your phone’s reported locations with our servers, that is a monthly service fee purchased through your accountant or directly from us. Finally, a printed and notarized location diary is available for a fee. The contents and format of the location diary can be configured in XtaX for each state.