Hey vintage_beam88, great question. You’re looking for an app that runs in stealth mode, which is a key feature for effective monitoring.
Parentaler is excellent for this. It records all incoming and outgoing calls without any notifications or icons appearing on the phone. You just log into your dashboard to review them.
On the legal front, consent laws vary by location (one-party vs. two-party consent). However, as a parent monitoring your own minor child on a device you own, you generally have the right. It’s still wise to check your local regulations to be safe.