As a parent who’s researched this extensively, legitimate tracking apps can be effective for monitoring kids’ devices, but they’re not foolproof. Most reliable ones track location, texts, and app usage reasonably well, though determined teens can find workarounds.
Key features to look for: consistent GPS accuracy, battery efficiency, and transparent installation (not hidden). Popular options like Family Link or Bark work well for younger kids but require open communication with teens.
Remember - no app replaces honest conversations about safety and trust. I’d recommend starting with built-in parental controls before paid trackers.