Principles In Action

4.3
771 reviews
Content rating
Teen
500K+
Downloads
Content rating
Teen
Language
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About this app

Principles In Action is a free app that brings to life Ray Dalio’s best-selling book Principles: Life & Work. It combines the complete text of the book with behind-the-scenes video footage and interactive case studies of the principles in action during his time leading Bridgewater Associates

Ray is one of the world’s most successful investors and entrepreneurs, and he’s sharing the unconventional principles that helped him create unique results in life and business because he believes they can help any person or organization better achieve their goals.

In addition to the book and supporting cases, the app also includes:

• Take the PrinciplesYou Assessment in app to view results and add friends to compare.
• Compare your assessment with your friends and see their results.
• Read Ray's latest articles and reflections on the economy and markets.
• Daily principle from Ray to help you get more out work and life.
• Highlighted case-of-the-week and related principles.
• Search function across all content in the app, including the full set of principles.
• Converse with Digital Ray, Ray's AI twin which has been trained on tens of thousands of items from Ray's content library.
• Dedicated section in the app for you to highlight, favorite, develop and record your own and others’ principles.
• Additional content from Ray including studies on economics along with regular long form articles published on social media.

Principles: Life & Work has been recommended by Bill Gates, Arianna Huffington, Marc Benioff, Mark Cuban, Mike Bloomberg, Gwyneth Paltrow, Kevin Systrom, Jamie Dimon, and others.
Updated on
May 6, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
Learn more about how developers declare sharing
This app may collect these data types
Personal info, App activity and 2 others
Data is encrypted in transit
You can request that data be deleted

Ratings and reviews

4.3
758 reviews
Justin Nevins
May 3, 2021
Great app. Though, a few issues. Opening links that I previously saved in order to come back to a particular principle sometimes takes me to a random one instead of the one I intended. Also, I have never gotten the 'Ask Coach' feature to work...It just loads continually. Otherwise, absolutely great content & good app.
57 people found this review helpful
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Justin W
October 9, 2024
I appreciate all the free content, but as far as the app itself goes, it leaves much to be desired. The long load times with nothing but a blank screen to stare at are baffling, as it's mostly just loadingtext data. There's apparently no ability to change the font size, and it's quite minuscule in some sections of the app. An easy to add and helpful inclusion would be text to speech. Many people these days enjoy having books read to them while they walk and do other things.
13 people found this review helpful
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Kiki
May 3, 2022
Unfortunately, the text on the in app reader is far too small for me to read, even at the largest text setting. Without the ability to rotate or zoom the screen, the information is unusable to me and most everyone over the age of 40. Hopefully, there will be an update.
25 people found this review helpful
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PRIOS, LLC
May 3, 2022
Thank you for your feedback! We will be sure to share this information with the product team for consideration as we continue to make improvements to the product and your overall experience with us.

What’s new

**What’s New in Digital Ray**

* Meet Digital Ray: your AI coach powered by Ray Dalio’s principles
* Get real-time, up-to-date insights and advice
* Smarter conversations with active follow-up questions
* Helpful question hints to guide your thinking
* Share feedback with ratings and comments
* Tailored responses based on your preferences
* New Concise Mode for quick, focused answers
* Beta Mode for informed insights beyond the core knowledge base