Josip Petrić

Kern turns a book you've already read into spaced repetition cards, without you having highlighted or noted anything while reading. The premise: most people finish a nonfiction book, remember one sentence a month later, and never captured a thing along the way. Every existing tool (Anki, Readwise) assumes you did the capture work. Kern assumes you didn't. You type a book title and get cards for it. iOS only, paid. Launched July 2026. Being straight with you since this is a roast: it has close to zero organic downloads and no conversions so far. I don't know whether that's the landing page, the concept, the price, or the fact that nobody actually wants this. Please don't be gentle. The most useful thing you can tell me is where you personally lost interest.