A Hidden MacBook Feature That Became an App Acquisition

Will Giess turned an overlooked feature inside newer MacBooks into Knock, a paid app that became his first real source of online income before he sold it through Acquire.com.

Will first validated the idea with 15 to 25 beta testers on Reddit, using their feedback to improve compatibility and refine the product. After launching on Product Hunt and gaining more traction through Instagram, he kept the business model simple: users could test the sensor, but unlocking the full app required a paid license.

In this episode, Will shares how he turned a technical experiment into a paid product, why growing other projects changed his priorities, and what happened when buyer interest became a negotiated app acquisition.

You'll hear:

• How Reddit beta testers helped Will validate compatibility before launch
• Why he kept Knock paid from the start and raised the price as demand grew
• What happened during buyer negotiations, due diligence, technical handover, and escrow

3 Lessons from Knock:

1. Validate Early: Beta users helped Will improve compatibility and uncover new use cases.
2. Sell for the Right Reasons: Revenue matters, but so do focus, upside, and where you want to spend your time.
3. Document Before Handover: Clear technical documentation made the transition easier for the buyer.

For founders, this episode shows how a focused product can grow from a small technical idea into a real business, and how the decision to sell can come down to where your time and attention have the most value.

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