How I Built a $100K App SOLO, Then Sold It (my story & what I learned)

How I Built a $100K App SOLO, Then Sold It (my story & what I learned)

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Edmund Yong recounts the full lifecycle of Easy Folders, a ChatGPT browser extension he built and sold for a five-figure exit after generating over $100,000 in revenue. The video walks through every stage—conception during ChatGPT’s launch period, shipping the first version while working full-time as a software engineer, early marketing on Reddit, OpenAI forums, and Facebook groups, and the mindset shift that came with earning his first online dollar.

The bulk of the video focuses on the decision to sell and the exit process itself. Yong explains how OpenAI’s native Projects feature made Easy Folders less essential over time, creating compounding platform risk that he had already been managing through frequent fixes to breaking changes. He listed the extension on Acquire.com, posted on X, and used the Trustmr Acquisition Marketplace, and details why the sale took longer than expected—stagnant growth curves matter significantly to buyers, who strongly prefer upward-trending revenue at the time of listing.

Yong draws out transferable lessons: timing an exit to coincide with growth, moving quickly once a serious buyer appears, and recognizing when platform dependency has turned into a liability rather than a distribution advantage. He argues that in an era of rapidly improving AI coding tools, the skills that create lasting competitive advantage have shifted toward user empathy, fast iteration, and marketing judgment rather than raw engineering ability alone. A useful case study for solo developers considering building on top of AI platforms.


📺 Source: Edmund Yong · Published May 10, 2026
🏷️ Format: Workflow Case Study

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