kernRead better.
Keep more.
Everything we know about why books fall out of your head, and the system that stops it. Free, no sign-up, no email gate — the science and the practical version of each idea.
Start here
How to Remember What You Read
The full system: why highlighting fails, what active recall does, and how to keep a book's ideas for years in five minutes a day.
Read the guide → The scienceWhy You Forget What You Read
The forgetting curve, explained: what happens to a book in your brain over 30 days, and the one intervention that changes the slope.
Read the guide → The methodSpaced Repetition for Books
How the technique behind Anki and language apps applies to non-fiction books — and why nobody did it until now.
Read the guide →In practice
Turn Any Book Into Flashcards
Making book flashcards by hand takes hours per book. Here's how to get a quality deck from just the title, in seconds.
Read the guide → AudiobooksHow to Remember Audiobooks
You can't highlight audio. Why audiobook retention feels worse, and how to keep what you heard without pausing to take notes.
Read the guide → The comparisonDo Book Summary Apps Work?
Summaries compress books you haven't read. Retention tools keep the ones you have. Which problem do you actually have?
Read the guide →Comparisons
Tools
Stop forgetting
what you read.
Add a book you've already finished — just the title. Get its ideas as cards, and review them for five minutes a day.
First book free. No account, no sign-up, works offline.
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