One file
No build step, no dependencies, no framework. The whole app is a single HTML file of about 30 KB.
What you get
Built lean.
Built lean.
Built to last.
Everything here comes straight from the companion app itself — no framework, no accounts, nothing to install.
Works offline
Open it and it works — nothing is fetched. No connection required, on the train or in the field.
No JavaScript needed
Tabs, flashcards and checkboxes are pure HTML and CSS, so it works even where scripts are blocked.
Mobile-first
Add it to your home screen and it opens full-screen, like a native app you actually own.
Private by design
Your ticks and notes are saved on your device only — no accounts, no tracking, nothing leaves your phone.
Free to use
Use, copy and share it freely with attribution. Please don't sell it or claim you wrote it.
How it works
Three moves.
Read the ideas, do the one move from each chapter, then put it to work over seven days.
01
Read the five big ideas
Every chapter, distilled to its key points — the conclusions from the book, kept short enough to hold in one sitting.
02
Do your one move
Each chapter comes with one exercise, as a tickable task. Small, specific and done today beats a plan for someday.
03
Run the 7-day challenge
One small move a day for a week, with 12 flashcards and a nine-move toolkit to keep the momentum going.
Live preview
See it
Carry the book's moves in your pocket.
- The five big ideas — each chapter with its key points, drawn from the book.
- Your one move — the exercise from every chapter, as a tickable task.
- 7-day challenge — one small move a day to put the ideas to work.
- 12 flashcards — the book's key terms, tap to flip.
- Toolkit — nine practical moves, the five-second move, if-then plans, the three A's and more.
Get started
Two ways in.
Open it in the browser, or keep a copy for good.
Recommended
Open it live
No install, no sign-up. It runs in any browser, on any device.
Open the app
Keep a copy
Go offline
Download the single file and open it anywhere — that one file is the whole app.
- Download
index.htmlfrom the repo. - Open it in any browser.
- On mobile, add it to your home screen.
FAQ
Questions.
Is this the book itself? +
No. It is the companion, not the book. It carries the book's key points and its exercises. The book ties every claim to a named source — for the arguments and the sources, read the book.
Do I need to install anything or sign up? +
No install and no sign-up. It runs in any browser, and it is a single HTML file if you'd rather keep it offline.
Does it work without an internet connection? +
Yes. Open it and it works; nothing is fetched. Once it is loaded (or saved to your device) it keeps working offline.
Do I need JavaScript enabled? +
No. The tabs, flashcards and checkboxes are pure HTML and CSS, so it works even where scripts are blocked.
Where is my data stored? +
On your device only. Your ticks and notes stay in your browser — no accounts, no tracking, nothing leaves your phone.
What does it cost, and can I share it? +
It is free to use. You may use, copy and share it freely with attribution. Please don't sell it or claim you wrote it — see the LICENSE for the exact terms.