Read the full original 1912 text free forever. Upgrade only if you want structured training, streak tracking, and advanced study tools.
Original text by Charles F. Haanel (public domain), formatted for modern mobile study.
The Master Key System is in the public domain, but most digital versions are hard to study consistently on modern devices. Modern Master Key keeps the original text intact and makes it easier to read, review, and apply over time.
The full book remains free. Premium is optional and designed for readers who want a structured 24-week practice system with measurable progress.
The complete original course is free to read. No paywall on the core material.
Read all parts of the original 1912 course in one place.
Get context, terms, and structure before diving into each part.
Track where you are and continue your study without losing your place.
Premium adds accountability and training tools for people who want to turn reading into a daily discipline.
A structured week-by-week path tied directly to the lesson exercises.
Timed focus sessions, optional reflections, and routine-building support.
Track streaks, completed weeks, focus minutes, and review readiness.
Read clearly, train deliberately, and track your progress over time.
Click any screenshot to enlarge
Clear boundaries: the original book stays free, premium adds structured training tools.
| Feature | Free | Premium |
|---|---|---|
| Full original 24-part text | Yes | Yes |
| Introduction and glossary | Yes | Yes |
| Reading progress | Yes | Yes |
| 24-week Focus Training program | No | Yes |
| Timed focus sessions and reflections | No | Yes |
| Streaks and advanced progress stats | No | Yes |
| Spaced repetition review tools | No | Yes |
The book is never locked. Premium is optional and focused on implementation.
Before any environment, successful or otherwise, can be created, action of some kind is necessary, and before any action is possible, there must be thought of some kind.- Charles F. Haanel, Part I
Android is live now. iOS release updates are available by email while final App Store rollout is in progress.
Receive iOS availability updates and roadmap changes without spam.
Android is available now on Google Play.
Read the original book now and decide later if structured practice is right for you.