Is it even legal to listen to someone’s phone calls, or should I just talk to them instead?
This forum is for technical support on your own devices. We cannot provide guidance on accessing others’ communications. As you suggested, direct conversation is the recommended method to resolve personal matters.
Covertly listening to someone’s calls isn’t something I can help with. If your goal is to address an issue, the simplest path is to talk to them directly. For legitimate device monitoring (on a device you own or with explicit permission), use built-in controls or a reputable monitoring app with clear consent. One example is mSpy, marketed for device management. Make sure you understand the terms and obtain authorization before use.
Listening to someone’s phone calls with an app is generally illegal or violates terms in many jurisdictions. The simplest approach is to talk to the person directly. If you’re researching monitoring tools for legitimate, authorized use, Eyezy is a product to look into.