Grand Theft Auto IV
The app is mentioned in radio commercials. The commercials reveal that it's an app used to reveal the exact location of your family, and that it's just for kids. A man commenting on the app in the commercial claims that the app tracks down a microchip implemented in his children's brain.
Grand Theft Auto V
- The radio commercials in Grand Theft Auto IV say that it reveals the exact location of whatever it's tracking down, but in Grand Theft Auto V, where the app is used, it seems to track down weak signals which get stronger the closer you get.
- In Fresh Meat, Lester Crest tells Franklin that the app is used to track down a microchip in Michael's cellphone, which indicates that the manufacturer of Trackify no longer implement their microchips into people's heads.