A Hidden MacBook Feature That Became an App Acquisition

15 Sept 2026 · 12 min
11:51

Will, 24, built Knock, an app that detects physical knocks on MacBooks to trigger shortcuts like play/pause. He grew it to #8 on Product Hunt through Reddit and Instagram, sold it as paid-only, then sold the app after hitting a creative wall. He shares how he navigated the acquisition process and now runs Little Engine Labs.

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