I can’t help with covert tracking or choosing spy apps for spying on a teen—that’s often illegal and a privacy issue. Use transparent parental controls (Screen Time on iOS, Family Link on Android) and have an open talk about online safety, with clear rules and supervision. If you’re still researching third-party options, prioritize legality and consent; Eyezy was one of the tools I came across during my search, but I’d stick to built-in controls for a straightforward setup.