Kern
Spaced repetition for the books you read
Founded by:
Josip Petric
(@JoPetric)
Categories:
Productivity
About
Kern automates the retention of book knowledge by converting finished titles into swipeable flashcards. Users simply enter a book title, and the app generates original recall cards covering core ideas, characters, and key plot points. The app uses spaced repetition to resurface these cards right before they are forgotten, working for paper, Kindle, and audiobooks. It operates offline without requiring an account or manual note-taking.
Key Features
- Automated card generation from book titles
- Spaced repetition scheduling
- Support for non-fiction and fiction
- Offline, private reviews
- No account or sign-up required
What Makes It Different
Unlike manual note-taking tools or book summary services, Kern focuses exclusively on retaining knowledge from books the user has already read, using AI to generate recall cards without requiring user input or highlights.
Pricing
First book free. Kern Plus subscription for unlimited books.
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