# Principles In Action vs Mindirus

The clearest difference is in-app purchases: Principles In Action at none against Mindirus's 6. Principles In Action also leads on ratings volume (6.1K vs 4). Mindirus's advantage is update cadence (every 2 weeks vs every 3 months) and review sentiment (100% vs 80%). On price, rating, ads and device support there is nothing between them.

Both are free to download. Mindirus sells 6 in-app purchases, starting at $14.99 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 5.0 for Mindirus. That said, the two scores are not equally well evidenced: Principles In Action has 6.1K ratings behind it against 4, so its average is the more settled of the two. Written reviews are what separate them: 80% of Principles In Action's written reviews are positive against 100% of Mindirus's.

Principles In Action ships an update every 3 months, Mindirus every 2 weeks. The most recent releases landed on October 24, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | Principles In Action | Mindirus |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.9 (6.1K ratings)](https://appshunter.io/ios/app/principles-in-action/id1211294305/reviews) | **[5.0 (4 ratings)](https://appshunter.io/ios/app/mindirus-exam-prep/id6795731090/reviews)** |
| Number of ratings | **6.1K** | 4 |
| Positive reviews | 80.3% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 180 MB | 54 MB |
| Requires iOS | **16.0** | 16.4 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 9+ | 4+ |
| Developer | [PRIOS, LLC](https://appshunter.io/developer/1211294304) | [Udabyte LLC](https://appshunter.io/developer/6783533995) |

## 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


### Mindirus

[App page](https://appshunter.io/ios/app/mindirus-exam-prep/id6795731090)

This app creates a personalized, day-by-day study plan for various certification and academic exams. It uses AI to adapt practice questions to your weak areas and provides detailed explanations for correct and incorrect answers. Track your progress with a readiness score and full-length mock exams.

**Highlights:** Adaptive practice questions, AI-powered explanations, Smart, scheduled study plans, Readiness score for exam preparedness, Full-length timed mock exams, Flashcards with spaced repetition, AI coach for personalized guidance

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Single Course | $14.99 | per month |
| 3-Course Bundle | $24.99 | per month |
| All-Access | $34.99 | per month |
| Single Course | $119.00 | per year |
| 3-Course Bundle | $199.99 | per year |
| All-Access | $299.99 | per year |


## Frequently asked questions

### Is Principles In Action free?

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

### Is Mindirus free?

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

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

Mindirus is rated higher. Principles In Action averages 4.9 out of 5 from 6.1K ratings, while Mindirus averages 5.0 from 4 ratings.

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

Neither Principles In Action nor Mindirus shows ads.

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

Principles In Action ships an update every 3 months, and Mindirus every 2 weeks. Most recently, Principles In Action was updated on October 24, 2026 and Mindirus on October 17, 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.*