The $85K App That Started With a Tweet, Not a Line of Code

Jack and Nick Sweeney launched Coherence, a nervous system regulation app, eight months ago. It has 15,000 downloads, 2,000 paying users, and $85,000 in revenue, averaging $11,000 per month with a peak month of $22,000. But the most striking detail about their story is this: Jack, the technical co-founder, never wrote a single line of code in the entire codebase. They built the app using AI coding tools like Cursor and Cursor agents, and they validated the idea through content before writing any code at all.

Content Before Product: Reverse Engineering the App

The Sweeney brothers did not start with a prototype or a business plan. They started with tweets. Jack had a background in content creation—he grew a YouTube channel to 20,000 subscribers in university—and Nick had a personal story that gave him credibility: a Division I cross-country skier who was told by doctors he would never walk again, he used breathwork to recover within three months and began coaching others with chronic conditions.