Turn what you learn into what you know.
Read a book. Write what you understood. Come back later and write it again. See how your thinking changed.
iPhone, iPad, and Mac. Not on the App Store yet.
Inside a concept
Your current explanation, with every earlier one kept underneath it.
Your understanding
“Feedback is naming what happened and what it did to the work. I told Tom his demo skipped the customer problem and jumped straight to features. But I said it right after the demo, while he was still rattled. Same words on Monday landed completely differently. Timing isn’t a nice-to-have. It changes whether the person can hear you at all.”
Last written 12 August
Earlier, 2 April
“Feedback should be specific, timely, and about behavior not the person. Give it close to the event so the details are fresh.”
Illustrative layout. It shows how a concept reads rather than a finished app screen.
The record
How that explanation got there. Four months, one concept.
2 April
Monday evening, chapter two
You capture the passage
A paragraph about what makes feedback land. You send it to Keep Knowing from the book app and keep reading.
“Most people think feedback fails because of what was said. It usually fails because of when it was said.”
From the book
2 April
The same evening
You write your first explanation
In your own words, short and borrowed. It is enough. The date is recorded and the explanation is kept exactly as you wrote it.
“Feedback should be specific, timely, and about behavior not the person. Give it close to the event so the details are fresh.”
Your explanation
9 April
A week later
You practise recalling it
A prompt appears without your notes attached. You answer first, then compare. The gap between what you remembered and what you wrote is the useful part.
“Think of the last time you gave someone feedback. What made it land or not?”
Reflection prompt, Example
12 August
Four months later
You give feedback that doesn't land
You tell Tom his demo missed the customer problem. Right after the demo, he can't hear it. You try again Monday, same words, different result. The concept comes back with your earlier explanation waiting.
“Tried giving feedback right after a bad demo. He couldn’t hear any of it. Waited until Monday, same words, completely different conversation.”
Noted against the concept
How it works
Five parts, in the order you use them.
01
Capture
Save a highlight, a quote, a note from wherever you’re learning.
02
Concepts
Write what the idea means to you. Every version is dated and kept.
03
Practice
A prompt asks you to explain or give an example. You answer first, then see what you wrote before.
04
Return
Concepts come back on a schedule that spreads out over time. No streaks.
05
Chapters
Group related concepts into a chapter. Your understanding of a topic, in one place.
Why this is different
You can see how your explanation changed over months.
That history is the product. Not the prompts, not the schedule — the record of your thinking getting clearer.
You do the thinking. The app holds the structure.
Built around explanation
You don’t just save highlights. You say what they mean.
Reflection, not drills
Prompts ask you to explain, compare, and find limits. No right answer to match.
Apple platforms
iPhone
Capture while you’re reading. Answer a prompt when you have a minute.
iPad
Read what you captured and think about it.
Mac
Where you write your explanations and build chapters.
Questions
How is it different from a note-taking app?
Note-taking apps are built around capture. Keep Knowing is built around explanation. Saving a highlight is the beginning; the concept only exists once you have said what it means in your own words.
How is it different from flashcards?
Flashcards drill facts. The ideas you get from a book don't fit on a front and back. Keep Knowing asks you to explain in your own words, then compares what you wrote with what you wrote before — not with a right answer.
A personal textbook you wrote yourself, one concept at a time.
Built from what you read and what you lived, in your own words.
Join the launch listStill being built. We'll let you know when it's ready.