Principles in Action is a free app that brings to life Ray Dalio’s best-selling book Principles: Life & Work by guiding you through interactive videos of actual cases of these principles in action at his company Bridgewater Associates. And it provides a lot more.

Principles in Action is being offered free-of-charge in response to strong demand to see Ray’s principles actually operating in the work environment. It includes:

* The complete bestselling book Principles: Life & Work with interactive case studies that show closed-door meetings at Bridgewater.

* The option for you to answer questions about your reactions to these principles shown in action. In future releases, these answers will allow you to compare your reactions to operating this way with those of others to help you learn about yourself.

* A digital “Coach” to help you easily find the appropriate principles for the specific situations you face. It will soon be adapted to help you develop your own principles and collect principles from others.

* Several of Ray’s studies on economics and investing and related subjects.

Principles in Action is also a platform for receiving other principles and tools as they are released, including courses and a tool to help you to develop your own principles. In the future, you’ll also have a chance to take a one-of-a-kind personality assessment which, when combined with your answers to questions in the courses, will give you a detailed picture of what you’re like along with tailored tips to help you achieve your goals in light of what you’re like.

Principles in Action was developed by Ray and Bridgewater for training at Bridgewater Associates. It is based on the principles that produced Bridgewater’s success and were explained in Ray’s book Principles: Life & Work. This book has been recommended by numerous leaders from all walks of life such as Bill Gates, Arianna Huffington, Marc Benioff, Mark Cuban, P. Diddy, Mike Bloomberg, Kevin Systrom, Jamie Dimon, and many others.

What’s New

Version 2.5.0

Welcome back! Principles in Action is continuously being updated with new content, features, and improvements to provide you with the best experience possible. Make sure you leave your updates on so you don’t miss a thing.

In this release you will see:
* A redesigned case player
* An updated settings menu
* Improved stability & bug fixes

Ratings and Reviews

4.9 out of 5
4.1K Ratings

4.1K Ratings

joej4098 ,

Love the content - App is very buggy

This is great stuff but it is marred by the fact that many of the diagrams don’t show and the other multimedia features (videos etc) of the app just don’t work. Also I can’t save ”My Principles “. Lots to fix here. Also the app should lend itself much better to group reading where sone have the book and others have the app. The book’s principles are numbered and in the app they aren’t. Lots of fumbling around to get on the same page when some have the app and others have the book.

Developer Response ,

Thank you for the feedback. We are sorry that you are experiencing problems with the app. If you have not been able to resolve, please email our customer support team at and we will get fixed for you. Your request for changes to improve the group reading experience has been submitted to our Product team for future consideration. Please note that you can submit feedback directly to our Product team, from within Principles In Action, by tapping the Question Mark icon, and then the Notepad icon in the top right.

Ed35684 ,

Makes Material Convenient

This really makes digesting Ray Dalio’s lessons convenient. The app remembers where you left off in the books (which also contain extra media) you also get case studies for these principles as if you were a Bridgewater employee.

Honestly, the five star rating really goes to the Coach feature included. I’d say that is the most valuable tool as the app can personally give you principles that would help you gain clarity and resolution to your most pressing problems. Fantastic stuff, I am extremely grateful.

Davidrocks1992 ,

Fantastic value!

I have been following Ray Dalio for several years now and read both his books. When I heard about this app I right away downloaded it and have been amazed how much solid value I have received from it. Thank you Mr. Dalio for sharing your lifetime of experience with the next generation. I am a business owner and your expertise is a valuable part of my long term strategy. I recommend your book and app to all of my friends who are hungry for learning!


202.1 MB

Requires iOS 11.0 or later. Compatible with iPhone, iPad, and iPod touch.



Age Rating
Infrequent/Mild Profanity or Crude Humor
Infrequent/Mild Cartoon or Fantasy Violence


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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