Halo turns your MacBook's notch into a Dynamic Island, and it works on external monitors without a notch too. Now playing from any app with synced lyrics, today's calendar and next event, volume and brightness HUDs, timers, a file shelf with AirDrop, clipboard history, and downloads and screenshots that land right in the notch. Plus real brightness, contrast and input control for external displays over DDC/CI. Native Swift, no account. One-time purchase.