By default your HOOT Bike Tracker is always activated, whether you are close or thousands of miles away.
Your bike is under constant surveillance. You can suspend notifications (1h, 3h or endless) to avoid being disturbed in the HOOT mobile app.
Imagine : you buy a HOOT Bike Tracker, reload it and then install it on your bike without downloading the mobile app.
Your bike would in any case be geolocated. The data is kept on your smartphone.