Tracking app

Definition
A tracking app is

"a computer program and location-based service that consists of two parts. One part is installed on the smartphone of the person being tracked; that part accesses and tracks the device's location and transmits that information. The second part is installed on a computer or another smartphone and is used by the person doing the tracking to receive the transmitted location data and see where the tracked person is or has been over a period of time. The installation of a tracking app on a smartphone can require physical access to the smartphone being tracked."