# Principles In Action — By Ray Dalio

> Interactive app for life and work principles with assessments and case studies. (iPhone/iPad app by PRIOS, LLC.)

- Source: https://appshunter.io/ios/app/principles-in-action/id1211294305 (this page in markdown: same URL + `.md`)
- Developer: [PRIOS, LLC](https://appshunter.io/developer/1211294304)
- Category: Education, Lifestyle
- Price: Free
- Rating: 4.90/5 from 6,064 App Store ratings · 142 written reviews indexed
- Age rating: 9+
- Requires: iOS 16.0 · 177 MB
- Languages: American English
- Released: 2019-04-05
- Data updated: 2026-08-27
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/principles-in-action/id1211294305/reviews.md

## What is Principles In Action?

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.

## Key features

- Interactive case studies
- Behind-the-scenes video footage
- PrinciplesYou Assessment
- Personality test
- Daily principle from Ray
- Digital 'Coach' for principle guidance
- Personal principle development section

## What do users think of Principles In Action?

Overall sentiment: positive

**Pros**

- 💡 Excellent content and resources
- 👍 Helpful for self-development and growth
- 🚀 Seamless integration with book
- 🤩 Life-changing insights

**Cons**

- 🐛 Crashes and loading issues
- 🔒 Privacy concerns with data sharing
- 🔍 Difficulty accessing saved progress
- ⏱️ Slow app performance

**Commonly reported bugs**

- Frequent crashes
- Inability to open book or case studies
- Lost progress and saved data
- Compatibility issues with older devices

**Most requested features**

- Dark mode option
- Ability to export user-added principles
- Improved sync across devices
- Better integration with book content

## Recent user reviews (10 of 142)

All indexed reviews: https://appshunter.io/ios/app/principles-in-action/id1211294305/reviews.md

### 5/5 — The best app on the Apple App store

*2026-03-25, version 5.0.2*

This is by far the most profound app for personal and professional success that you can find out there.

### 5/5 — Valore immenso

*2026-01-30, version 5.0.2*

Il valore di ciò che Ray condivide gratuitamente è intenso. Quest’app ne è profondamente ricca. Grazie

### 5/5 — Fantastic app by Ray Dalio

*2025-12-06, version 5.0.2*

Very useful economic and personal growth principles and study cases. Obviously, for those in finance there is no need for introduction who Ray Dalio is!

### 5/5 — I love this

*2025-11-15, version 5.0.2*

This app has become important in my daily routine. Internalizing Ray's perspectives in life and business has greatly contributed to my evolution. Really grateful for this.

### 5/5 — Review

*2025-11-14, version 5.0.2*

Great App and also great Book!! 

Tiny detail about an improvement in the app. 
Clicking the favorite heart icon in the Principles section, is quite difficult. It seems a a bit unresponsive or as if it needs to be clicked in a very small spot. I often have to click many times before it responses.

### 5/5 — Thank you

*2025-05-27, version 5.0.2*

I’ve been reading Ray Dalio’s 3rd book and as much as possible I’m using the app!!!Thank you for sharing your experience and knowledge with us Ray!
Greatly appreciated

### 3/5 — Can’t favourite principles

*2025-05-20, version 5.0.2*

The app needs updating - I haven’t been able to add principles to my favourite list for at least a year

### 5/5 — App crashing

*2025-03-14, version 5.0.1*

I’m giving this five stars because I’ve been using this for years and I love it, but recently the app has been crashing so often that it’s become unusable. 
Can someone please address this? 
Thank you

### 5/5 — Principles of the day are always loading

*2024-12-11, version 5.0.1*

Edit: 11.12.24 

Still Great App, have Problem to add principles to my favourites on iPhone 12 you can hit the heart button / it’s not responsive. 

This old problem is fixed:
Great App, but I never got to see the principle of the day since it’s always loading.

### 5/5 — App crashing

*2024-11-24, version 5.0.0*

I’m giving this five stars because I’ve been using this for years and I love it, but recently the app has been crashing so often that it’s become unusable. 
Can someone please address this? 
Thank you

## Frequently asked questions about Principles In Action

### What is Principles In Action?

Principles In Action is a free app that brings Ray Dalio's best-selling book 'Principles: Life & Work' to life. It offers the complete text of the book, exclusive video footage, and interactive case studies demonstrating the principles in action at Bridgewater Associates.

### What are the key features of the app?

The app includes interactive case studies, behind-the-scenes videos, the PrinciplesYou Assessment to compare with friends, a personality test, daily principles from Ray, a digital coach for guidance, and a section to develop your own principles.

### Is there a cost to use Principles In Action?

No, Principles In Action is a free app. It does not have in-app purchases or advertisements, providing full access to its content without any cost.

### Who is this app designed for?

This app is designed for anyone looking to improve their life and work outcomes by understanding and applying unconventional principles that have led to unique results in business and investing. It's beneficial for individuals, leaders, and organizations aiming to achieve their goals.

### How can the app help me find the right principles for my situation?

The app features a digital 'Coach' designed to help you easily find appropriate principles for specific situations you are facing. This feature acts as a guide, suggesting relevant principles based on your challenges.

## Version history (last 5 releases)

### 6.0.1 — 2026-07-20

"Work for goals that you and your organization are excited about . . ."

Whats new:
Now you can start a conversation with Digital Ray from any of the books or articles.
General performance improvements and bug fixes.

### 6.0.0 — 2026-04-27

Welcome to Digital Ray!

Digital Ray is the new Coach, it is an Al tool that shares Ray Dalio's unique insights and decision-making principles with users. We're excited to bring you following features:

Real-time Online Information: Digital Ray uses real-time online data for up-to-date, relevant advice.

Active Interaction: Digital Ray actively asks questions to understand you better and improve response accuracy.

Question Hints: To enhance your user experience, Digital Ray will generate question hints beneath certain answers.

Comment and Rate: You can give feedback by adding a comment and/or rating the response provided by DigitalRay to your query.

Profile Narrative: Your profile features a narrative-style summary that evolves naturally based on your conversations with Digital Ray.

Learn About Me: Digital Ray will utilize your profile data to provide personalized responses based on your preferences.

Concise Mode: When enabled, Digital Ray provides shorter, more direct responses focused on the most relevant information rather than extended explanations.

Beta Mode: Digital Ray uses ‘Beta Mode’ to offer informed speculation when direct answers from Ray Dalio's knowledge base are unavailable.

Feedback Survey: Want to help improve Digital Ray? We've added a feedback survey and would love to hear your thoughts.

### 5.0.2 — 2025-03-20

“Logic, reason, and common sense are your best tools for synthesizing reality and understanding what to do about it.”

Now You can see popular passages in books, highlighted by other users, displayed as underlined text. Easily toggle this feature on or off from Settings to customize your reading experience.

General performance improvements and bug fixes.

### 5.0.1 — 2024-11-25

“Encourage people to be objectively reflective about their performance.”

New Feature: Added the ability to favorite articles.
General performance improvements and bug fixes.

### 5.0.0 — 2024-09-16

“Evolving is life's greatest accomplishment and its greatest reward.”

* Completely revamped the Home screen for a cleaner and more intuitive experience. With improved navigation and a sleeker layout, it’s easier than ever to find what you need.

* Addressed minor bugs and made various improvements to enhance your overall app experience.

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-27.*