Free Mac companion
Download Control My Mac for Mac.
Install the menu-bar companion, open it, and scan the QR code from the iPhone app. The Mac app is free and required for pairing.
macOS 14+ · Apple Silicon and Intel · No account
Signed with an Apple Developer ID and notarized by Apple, so macOS opens it normally.
Then get the iPhone app — coming soon to the App Store. It's the remote; this free Mac app is the receiver it pairs with.