Instead, consider relationship counseling or legal means. Secret tracking is a form of abuse in many jurisdictions.

: This app analyzes mobile radio data to warn users about insecure network settings and potential IMSI-catcher attacks. It often requires a phone with a Qualcomm chipset and "root" access to function fully. : A more recent tool released by the Electronic Frontier Foundation (EFF)

The idea of a is a myth. You cannot turn a $500 smartphone into a $50,000 surveillance rig with a simple download. If you need to find a lost phone or keep tabs on a family member, stick to the official tools provided by Apple and Google. They are safer, legal, and—most importantly—they actually work.

He crouched beneath the window, listening. Muffled voices. The low drone of a television.