Thinking Space · A Local-First AI Health + Notes App

01The Full Story: An App Born to Save Its Maker

This project didn't start as a business, it started as self-rescue. The protagonist runs Topbook, a knowledge-content channel with over a million followers, and describes himself as a humanities major who doesn't write code. He developed Ménière's disease, suffering sudden spells of vertigo and fainting with no warning, which upended his life and stopped his content output for six months. In that situation he vibe-coded an app for himself — called Thinking Space — that stores data from a continuous glucose monitor, Apple Health, expense tracking, and notes entirely on his own phone, with a single API letting AI analyze the triggers of his vertigo and give actionable advice the moment an episode hits. The framing has to be clear: **this is not a ready-made business**. There's no monetization, no pricing, and it's purely for personal use — the creator himself only says he can share it if people are interested. Treating it as a "copy this and make money" template would miss the point entirely. The video itself pulled 187K views, but that's traffic from the founder's existing personal brand, not something the product earned. So why include it? Because a deeply real self-rescue story points at a product form with genuine market potential: "local-first + multi-source health data + AI actionable advice in real time." And it incidentally proves something else — a humanities major built a moderately complex health app with vibe coding, which means the development barrier for this kind of product has been flattened by AI. What we're capturing is that **direction** and that **signal that the barrier is broken**, not its business model.