Description
Modern Master Key brings Charles F. Haanel’s classic The Master Key System into a focused reading and study experience for today’s reader.
Read the complete original public-domain text free, including the introduction, glossary, and all 24 parts. Premium unlocks a complete Modern Edition of the text, plus guided study tools, focus sessions, reflections, highlights, notes, and progress tracking.
Move through the work at your own pace, or follow a structured 24-week study path designed to support consistent reading, reflection, and intentional practice.
About the Text
This app includes the public-domain text of The Master Key System by Charles F. Haanel, originally published beginning in 1912 and compiled in early 20th-century editions.
The original text is preserved as historical source material. The Modern Edition is an app-created reading version designed to make the material clearer and more accessible for contemporary readers.
Free Features
• Complete original 24-part text
• Introduction and glossary
• Universal search
• Reading progress tracking
• Weekly reminder controls
Optional Premium Features
• Complete Modern Edition for all 24 parts
• Original/Modern reading toggle
• Guided 24-week focus workflow
• Discipline Mode for structured progression
• Timed focus sessions and reflection tracking
• Highlights, bookmarks, notes, and Favorites Hub
• Spaced repetition review and export tools
• Key Takeaways
• Live Activity support for active focus sessions
• Apple Watch companion support
No medical, psychological, scientific, financial, or guaranteed-outcome claims are made.
Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Privacy Policy: https://modernmasterkey.com/privacy.html
What's new (v1.1)
Version 1.1 is a major content and study update.
• Added a complete Modern Edition of The Master Key System, offering a clearer contemporary reading experience alongside the original text.
• Added an Original/Modern reading toggle for supported lessons.
• Improved study tools, including highlights, bookmarks, notes, Favorites Hub, and review support.
• Enhanced the 24-week focus training workflow with better progress tracking and session flow.
• Improved Apple Watch companion support and focus-session syncing.
• Improved readability across Light, Dark, and System reading modes.
• Fixed bugs and made general stability improvements.