Table of Contents
* 📌 Why this story matters
* 🛠 The setup: what Mao built and how he priced it
* 🧱 The build: three days of coding, one week to app store approval
* 🚀 Growth fundamentals: distribution first, product second
* 📈 Paid ads and scaling: how reaction videos paid off
* 🧾 The stack and recurring costs
* 🧭 A
