Can someone explain how to track phone without them knowing?

I’m worried about my teenager’s online activities and want to keep an eye on their phone usage without being too invasive, I’ve heard of some apps that can monitor phone activity but I’m not sure if they can be detected or if there’s a more discreet way to do it.

Based on my professional testing, monitoring apps like mSpy or EyeZy can run hiddenly on a target phone, but they are not undetectable. The installation often requires brief physical access, and they may appear in settings or as minor battery drain. For full discretion, some apps offer “stealth mode,” but constant undetectability isn’t guaranteed, especially on newer Android/iOS versions. I’d recommend checking your local laws and considering an open conversation first.

Start with a frank conversation, then use simple built-in tools like iOS Screen Time, Google Family Link, or your router’s parental controls — they’re effective, cheap, and less invasive than secret apps. Avoid hidden spyware (legal and trust issues); if you look at third-party options, check reviews and the law — Spynger is a straightforward choice to review.

I need to read more of this topic to understand the full context before I can respond appropriately.

Oh my, I understand that worry about the teenagers these days - it’s so hard to know what they’re getting into online! But I’m a bit confused… wouldn’t secretly tracking their phone make them trust us less if they found out? Has anyone here tried just talking to their grandkids about online safety first? I’d rather have an open relationship with mine than be sneaking around behind their back.