Andrew Tattersall has 476,000 followers on the scroll, and he is building an app to cure it

There is a particular kind of honesty in naming your own product's enemy after the thing that made you. Andrew Tattersall has 476,000 followers on Instagram. He got them the way everyone gets them: short videos, vertical, in a feed engineered to keep you there. He then titled his public build log I'm building an app to cure brain rot.

That is either a contradiction or the most interesting thing about him, and it is the second one.

The app, and what it is actually arguing

The Polymath App takes the format that is very good at holding attention and points it at material worth holding attention on. Structured learning paths, taught visually with animation and imagery, across more than 25 areas, and the list is the tell, because it refuses to be a coherent product category. Handwriting. Backgammon. Stoicism. Sign language. Astronomy. Piano. Speed reading. Evolutionary psychology. Quantum physics. Large language models.

The central feature is called Pursuits: name any topic you want to learn and it assembles a structured curriculum, broken into chapters and levels, so the wanting-to-learn-something impulse has somewhere to land other than four unrelated tabs and a bookmark folder you will never reopen. The framing on the site is blunt about the swap it is proposing, replace scrolling with visual learning, and the app is on a waitlist ahead of launch rather than shipped, so this is a bet in progress rather than a finished argument.

The name is doing real work too. A polymath is a person of wide knowledge, and building for that person means building for someone with several unfinished interests running at once, which the productivity software industry has spent two decades treating as a defect to be optimized away. It is the same instinct that made Tobi Lütke file himself under aspiring comprehensivist, and the same one this site was built on.

Why the 32 matters

The other duality is the one that earns him the audience. He switched into software engineering at 32, out of recruitment, with no computer science degree, and rather than letting that story end at the offer letter the way these stories normally do, he pointed a camera at the four years that came after. The learning, the remote work, the visible figuring-it-out. His four-years-of-coding reel is the most honest thing on the grid and the right forty seconds to send anyone who thinks they started too late.

It also explains why he is building a learning app instead of something else. He has done the adult version of teaching yourself a difficult subject from scratch, recently enough to remember exactly where it goes wrong: not the difficulty, the lack of a path.

The obvious failure mode for a creator this size is that the content quietly eats the craft and you end up a full-time explainer of a job you no longer do. He is running the opposite play, spending the audience on a product that asks people to close the app he found them in. Get on the waitlist, then go read the build log.

I'm building an app to cure brain rot.

The actual title of Andrew's build log, written by a man with 476,000 followers on Instagram