The Mac App Store edition of Core-Monitor has no account system, no analytics, and no advertising code. It reads system status to draw its own interface, and that reading stays on your Mac.
Weather is off by default. The app requests location only after you turn on Show local weather in Settings. It never asks for camera, microphone, contacts, photos, accessibility, input monitoring, automation, or full disk access.
While weather is on, the app sends the device location to Apple WeatherKit for the forecast and to Apple’s geocoding service for the city name, and loads the Apple Weather logo from Apple. The Core-Monitor developer does not receive your location. Core-Monitor makes no other network requests; macOS and App Store components may independently contact Apple services.
Turn off Show local weather in Settings, or withdraw location access in macOS System Settings. Turning it off stops Core-Monitor’s weather requests. Everything else keeps working either way.
Questions about this policy go straight to the developer.