# Derang vs Greatness OS

The clearest difference is review sentiment: Greatness OS at 100% against Derang's 50%. Greatness OS also leads on rating (5.0 vs 1.0) and update cadence (every 6 weeks vs every 5 months). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Greatness OS holds the better App Store score, 5.0 against 1.0. That said, the two scores are not equally well evidenced: Greatness OS has 8 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 50% of Derang's written reviews are positive against 100% of Greatness OS's.

Derang ships an update every 5 months, Greatness OS every 6 weeks. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Derang | Greatness OS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/derang/id6467144648/reviews) | **[5.0 (8 ratings)](https://appshunter.io/ios/app/greatness-os/id6761624399/reviews)** |
| Number of ratings | 1 | **8** |
| Positive reviews | 50.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 6 weeks** |
| Monetization | Free | Free |
| Size | 29 MB | 188 MB |
| Requires iOS | 15.1 | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [LinkerTech Inc.](https://appshunter.io/developer/1708287004) | [Parsa Peykar](https://appshunter.io/developer/1890513007) |

## What reviewers say

### Derang

[App page](https://appshunter.io/ios/app/derang/id6467144648)

This app guides you through mindfulness meditation to help you stay present and reduce worries about the past or future. Regular practice enhances your ability to pause between stimuli and responses.

**Highlights:** Mindfulness meditation guidance, Develop present moment awareness, Reduce past regrets, Lessen future worries, Practice pausing between stimuli and response

**Features:** macOS Compatibility

**In-app purchases:** none


### Greatness OS

[App page](https://appshunter.io/ios/app/greatness-os/id6761624399)

Unlock your mental potential with this comprehensive performance system. It offers interactive training, daily challenges, and tools to build confidence, focus, and emotional control. Designed for athletes, leaders, and high achievers, it helps you perform under pressure and achieve peak performance.

**Highlights:** Mental performance training, Daily mindset challenges, Emotional regulation tools, Athlete mindset programs, Focus and flow training, Visualization and confidence building, Performance tracking

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Derang free?

Derang is free to download, with no in-app purchases.

### Is Greatness OS free?

Greatness OS is free to download, with no in-app purchases.

### Which has better reviews, Derang or Greatness OS?

Greatness OS is rated higher. Derang averages 1.0 out of 5 from 1 ratings, while Greatness OS averages 5.0 from 8 ratings.

### Do Derang or Greatness OS have ads?

Neither Derang nor Greatness OS shows ads.

### Which is updated more often, Derang or Greatness OS?

Derang ships an update every 5 months, and Greatness OS every 6 weeks. Most recently, Derang was updated on November 3, 2026 and Greatness OS on October 31, 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.*