# One Brain vs ImagineThat!

The clearest difference is rating: ImagineThat! at 5.0 against One Brain's 4.4. ImagineThat! also leads on in-app purchases (none vs 1) and iOS requirement (12.0 vs 15). One Brain's advantage is ratings volume (297 vs 2). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. One Brain sells 1 one-off in-app purchase. ImagineThat! asks for nothing beyond the download.

ImagineThat! holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: One Brain has 297 ratings behind it against 2, so its average is the more settled of the two.

Both ship on a similar rhythm, roughly weekly. The most recent releases landed on October 24, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | One Brain | ImagineThat! |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.4 (297 ratings)](https://appshunter.io/ios/app/one-brain/id1229367064/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/imaginethat/id6480038031/reviews)** |
| Number of ratings | **297** | 2 |
| Positive reviews | 58.6% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | Weekly | Weekly |
| Monetization | Free with in-app purchases | **Ad-supported** |
| Size | 10 MB | 44 MB |
| Requires iOS | 15 | **12.0** |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad, iPod |
| Age rating | +4 | 12+ |
| Developer | [Erik Wegener](https://appshunter.io/developer/424482392) | [Marvin Marz](https://appshunter.io/developer/1737957084) |

## What reviewers say

### One Brain

[App page](https://appshunter.io/ios/app/one-brain/id1229367064)

Test your cognitive abilities with a game inspired by the Stroop effect. Quickly identify matching colors, arrow directions, or true/false math equations under time pressure. Challenge your brain to process conflicting information and achieve high scores.

**Highlights:** Stroop effect inspired gameplay, Color matching challenges, Arrow direction tests, Math equation verification, Timed gameplay, Score tracking

**Features:** Family Sharing, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $0.99 | one-time |

**What reviewers like**

- 👍 Simple and effective brain training
- 🧠 Helps improve focus and concentration
- 🤯 Challenging and addictive gameplay

**What reviewers complain about**

- ⏱️ Timer is too short, needs more time
- 🙄 Excessive ads and interruptions
- 🤖 Inconsistent scoring and feedback

**Reported bugs**

- Incorrect registering of correct answers
- Crashes and freezes on certain devices
- Keyboard controls not working as expected

**Requested features**

- Adjustable difficulty levels
- More game modes and variations
- Option to disable ads or pay for ad-free version


### ImagineThat!

[App page](https://appshunter.io/ios/app/imaginethat/id6480038031)

An interactive game where players use AI to generate images and challenge friends to guess them. It's designed for connection, laughter, and creating memories together, regardless of distance.

**Highlights:** AI-generated images, Interactive gameplay, Multiplayer challenges, Creativity testing, Connect with friends

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is One Brain free?

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

### Is ImagineThat! free?

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

### Which has better reviews, One Brain or ImagineThat!?

ImagineThat! is rated higher. One Brain averages 4.4 out of 5 from 297 ratings, while ImagineThat! averages 5.0 from 2 ratings.

### Do One Brain or ImagineThat! have ads?

Both One Brain and ImagineThat! show ads.

### Which is updated more often, One Brain or ImagineThat!?

One Brain ships an update weekly, and ImagineThat! weekly. Most recently, One Brain was updated on October 24, 2026 and ImagineThat! on October 21, 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.*