Is there a way to know if someone is on only fans without them knowing?

my kid has been acting secretive with her phone lately and i suspect she might be on adult subscription sites but i dont want her to know im checking so are there any monitoring tricks that work without getting caught

Monitoring software like Spynger can run hidden on a target device, tracking browser history and app usage. However, installing it without the device owner’s knowledge is legally questionable in many regions, especially for a minor. Open communication with your child is often a more appropriate first step.