# Peekaboo+ vs Greatness OS

The clearest difference is in-app purchases: Greatness OS at none against Peekaboo+'s 8. Peekaboo+'s advantage is update cadence (every 2 weeks vs every 6 weeks) and iOS requirement (13.0 vs 15.1). On price, ads and device support there is nothing between them.

Both are free to download. Peekaboo+ sells 8 in-app purchases, starting at $9.99 per month. Greatness OS asks for nothing beyond the download.

Peekaboo+ ships an update every 2 weeks, Greatness OS every 6 weeks. The most recent releases landed on October 16, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Peekaboo+ | Greatness OS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (8 ratings)](https://appshunter.io/ios/app/greatness-os/id6761624399/reviews)** |
| Number of ratings | — | **8** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 6 weeks |
| Monetization | — | Free |
| Size | 53 MB | 188 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [Anthony Cerasuolo](https://appshunter.io/developer/1885768979) | [Parsa Peykar](https://appshunter.io/developer/1890513007) |

## What reviewers say

### Peekaboo+

[App page](https://appshunter.io/ios/app/peekaboo-plus/id6760692732)

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

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Basic Plan | $9.99 | per month |
| Pro Plan | $19.99 | per month |
| Premimum Plan | $29.99 | per month |
| Newborn Sleep Guide | $9.99 | one-time |
| Building Better Sleep Habits | $12.99 | one-time |
| Toddler Sleep Foundations | $12.99 | one-time |
| Sleep Training Success Guide | $12.99 | one-time |
| Managing Toddler Bedtime Challenges | $12.99 | one-time |


### 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 Peekaboo+ free?

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

### Is Greatness OS free?

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

### Do Peekaboo+ or Greatness OS have ads?

Neither Peekaboo+ nor Greatness OS shows ads.

### Which is updated more often, Peekaboo+ or Greatness OS?

Peekaboo+ ships an update every 2 weeks, and Greatness OS every 6 weeks. Most recently, Peekaboo+ was updated on October 16, 2026 and Greatness OS on October 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.*