# Principles In Action vs Readwise

The clearest difference is in-app purchases: Principles In Action at none against Readwise's 8. Principles In Action also leads on review sentiment (80% vs 72%) and ratings volume (6.1K vs 1.5K). Readwise's advantage is update cadence (every 2 weeks vs every 2 months). On price, rating, ads and device support there is nothing between them.

Both are free to download. Readwise sells 8 in-app purchases, starting at $4.99 per month. Principles In Action asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.9 for Principles In Action against 4.8 for Readwise. Both are backed by a comparable volume of ratings — 6.1K and 1.5K respectively. Written reviews are what separate them: 80% of Principles In Action's written reviews are positive against 72% of Readwise's.

Principles In Action ships an update every 2 months, Readwise every 2 weeks. Both last shipped on September 24, 2026.

## The numbers

| Metric | Principles In Action | Readwise |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (6.1K ratings)](https://appshunter.io/ios/app/principles-in-action/id1211294305/reviews)** | [4.8 (1.5K ratings)](https://appshunter.io/ios/app/readwise/id1476885528/reviews) |
| Number of ratings | **6.1K** | 1.5K |
| Positive reviews | **80.3% of reviews** | 72.2% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 2 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 177 MB | 110 MB |
| Requires iOS | 16.0 | **15.5** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 9+ | 12+ |
| Developer | [PRIOS, LLC](https://appshunter.io/developer/1211294304) | [Readwise, Inc](https://appshunter.io/developer/1476885527) |

## What reviewers say

### Principles In Action

[App page](https://appshunter.io/ios/app/principles-in-action/id1211294305)

Explore life and work principles from a renowned investor through interactive case studies, video footage, and assessments. Discover personalized guidance and compare insights with friends to achieve your goals.

**Highlights:** 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

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none

**What reviewers like**

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

**What reviewers complain about**

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

**Reported bugs**

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

**Requested features**

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


### Readwise

[App page](https://appshunter.io/ios/app/readwise/id1476885528)

This app helps you retain more of what you read by centralizing and revisiting your highlights from various reading platforms. It uses spaced repetition and active recall techniques to improve memory and offers features like tagging, note-taking, and OCR for physical books.

**Highlights:** Synchronize highlights from multiple platforms, Daily review habit via app and email, Spaced repetition and active recall, Tag, note, and search highlights, OCR for paper book highlights, Convert highlights to flashcards

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Readwise Lite Monthly | $4.99 | per month |
| Readwise Lite Monthly | $6.99 | per month |
| Readwise Full Monthly Plan | $8.99 | per month |
| Readwise Full Monthly | $12.99 | per month |
| Readwise Lite Yearly | $52.99 | per year |
| Readwise Lite Yearly | $66.99 | per year |
| Readwise Full Yearly | $94.99 | per year |
| Readwise Full Yearly | $119.99 | per year |

**What reviewers like**

- 🚀 Powerful spaced repetition
- 📚 Seamless integration with reading apps
- 🔍 Helpful AI-powered features
- 🗓️ Useful daily review routine
- 🧠 Boosts knowledge retention

**What reviewers complain about**

- 💰 Expensive subscription
- 🔌 Sync issues with some platforms
- 📱 Subpar mobile app experience
- 🕰️ Lack of flexibility in daily review
- 🔍 Limited search functionality

**Reported bugs**

- Frequent app crashes
- Sync failures with certain accounts
- Unreliable highlight capture

**Requested features**

- Add support for more reading apps
- Improve sync and import capabilities
- Introduce more customization options
- Enhance search and organization tools
- Develop a more intuitive mobile interface


## Frequently asked questions

### Is Principles In Action free?

Principles In Action is free to download, with no in-app purchases.

### Is Readwise free?

Readwise is free to download, with in-app purchases available.

### Which has better reviews, Principles In Action or Readwise?

Principles In Action is rated higher. Principles In Action averages 4.9 out of 5 from 6.1K ratings, while Readwise averages 4.8 from 1.5K ratings.

### Do Principles In Action or Readwise have ads?

Neither Principles In Action nor Readwise shows ads.

### Which is updated more often, Principles In Action or Readwise?

Principles In Action ships an update every 2 months, and Readwise every 2 weeks. Most recently, Principles In Action was updated on September 24, 2026 and Readwise on September 24, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*