For Mac · free
Hey!ko Link for Mac
The free app that sends your Mac's sound to your iPhone.
Distributed outside the App Store, signed by the publisher and notarized by Apple: macOS checks when you open it where it comes from and that it hasn't been altered.
What you need
MacmacOS 14.4 (Sonoma) or later.
iPhoneThe Hey!ko app, on iOS 26 or later.
The same Wi-FiThe Mac and the iPhone on the same network.
Installing it
1. Open the .dmg file
The one you just downloaded, in your Downloads folder.
2. Drag Hey!ko Link to Applications
Then open it from Applications. It has no window: it lives in the menu bar, at the top of the screen.
3. Allow what macOS asks for
"Screen & System Audio Recording", to pick up the Mac's sound, and the local network, to find your iPhone. The sound is sent live, never recorded.
4. Pick your iPhone, type the code
Open Hey!ko on your iPhone: a 4-digit code appears. In the Mac's menu bar, pick your iPhone in the list, then type that code.
Trouble installing or connecting? It's all on the Support page.