# One Brain vs Dumbos

The clearest difference is in-app purchases: Dumbos at none against One Brain's 1. Dumbos also leads on ads (none vs shown). One Brain's advantage is device support (4 vs 2). On price, update cadence and iOS requirement there is nothing between them.

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

Both ship on a similar rhythm, roughly weekly. The most recent releases landed on October 13, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | One Brain | Dumbos |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (297 ratings)](https://appshunter.io/ios/app/one-brain/id1229367064/reviews)** | — |
| Number of ratings | **297** | — |
| Positive reviews | 58.6% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Weekly | Weekly |
| Monetization | Free with in-app purchases | — |
| Size | 10 MB | 34 MB |
| Requires iOS | **15** | 16.0 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad |
| Age rating | +4 | 4+ |
| Developer | [Erik Wegener](https://appshunter.io/developer/424482392) | [Halil Ibrahim Sucu](https://appshunter.io/developer/1810987301) |

## 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


### Dumbos

[App page](https://appshunter.io/ios/app/dumbos/id6745145970)

**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 Dumbos free?

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

### Do One Brain or Dumbos have ads?

One Brain shows ads; Dumbos does not.

### Which is updated more often, One Brain or Dumbos?

One Brain ships an update weekly, and Dumbos weekly. Most recently, One Brain was updated on October 13, 2026 and Dumbos on September 26, 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.*