# Peak vs Hidden History Project

The clearest difference is in-app purchases: Hidden History Project at none against Peak's 10. Hidden History Project also leads on ads (none vs shown) and iOS requirement (13.0 vs 15.0). On price, update cadence and device support there is nothing between them.

Both are free to download. Peak sells 10 in-app purchases, starting at $2.99 per month. Hidden History Project asks for nothing beyond the download.

Peak ships an update fortnightly, Hidden History Project every 9 days. The most recent releases landed on October 30, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Peak | Hidden History Project |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (146K ratings)](https://appshunter.io/ios/app/peak-brain-training/id806223188/reviews)** | — |
| Number of ratings | **146K** | — |
| Positive reviews | 63.5% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Fortnightly | **Every 9 days** |
| Monetization | Free with in-app purchases | — |
| Size | 321 MB | 24 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Synaptic Labs](https://appshunter.io/developer/1751726088) | [Ying Chen113492257131](https://appshunter.io/developer/6777512335) |

## What reviewers say

### Peak

[App page](https://appshunter.io/ios/app/peak-brain-training/id806223188)

Enhance your cognitive abilities with over 45 engaging games designed to improve memory, attention, problem-solving, and more. Track your progress with detailed insights and compete with friends. A free basic version is available, with an optional Pro upgrade for a full brain training experience.

**Highlights:** 45+ brain training games, Daily Workouts, Coffee Break mode, Performance insights and statistics, Advanced Training modules, Compete with friends

**Features:** Family Sharing, Apple Watch app, Vision Pro support

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 40% Off Peak Pro Monthly | $2.99 | per month |
| Peak Pro | $3.99 | per month |
| Peak Pro Plan | $3.99 | per month |
| Peak Pro Plan | $4.99 | per month |
| Peak Pro | $11.99 | per year |
| 40% Off Peak Pro Yearly | $19.99 | per year |
| Peak Pro Plan | $34.99 | per year |
| Peak pro | $34.99 | per year |
| Advanced Training Peak & Brainways Working Memory Part 1 | Free | one-time |
| Advanced Training Peak & UCL Emotion Management | Free | one-time |

**What reviewers like**

- 💪 Challenging and engaging games
- 🧠 Effective brain training
- 📊 Detailed progress tracking
- 🔍 Variety of game categories
- 🤩 Enjoyable and fun to play

**What reviewers complain about**

- 🔍 Limited free games
- 💰 Expensive subscription
- 🔁 Repetitive game content
- 🐛 Bugs and glitches
- 🤖 Inconsistent dictionary

**Reported bugs**

- Freezing and crashing issues
- Inconsistent game performance
- Incorrect scoring and ranking
- Syncing and login problems

**Requested features**

- More free games and content
- Ability to replay games without ads
- Improved game instructions and feedback
- More coordination and emotion-based games
- Customizable brain training experience


### Hidden History Project

[App page](https://appshunter.io/ios/app/hidden-history-project/id6777512333)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Peak free?

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

### Is Hidden History Project free?

Hidden History Project is free to download, with no in-app purchases.

### Do Peak or Hidden History Project have ads?

Peak shows ads; Hidden History Project does not.

### Which is updated more often, Peak or Hidden History Project?

Peak ships an update fortnightly, and Hidden History Project every 9 days. Most recently, Peak was updated on October 30, 2026 and Hidden History Project on October 25, 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.*