# One Brain vs FlashHand

The clearest difference is in-app purchases: FlashHand at none against One Brain's 1. FlashHand also leads on iOS requirement (12.0 vs 15). One Brain's advantage is update cadence (weekly vs every 18 months). On price, ads and device support there is nothing between them.

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

One Brain ships an update weekly, FlashHand every 18 months. The most recent releases landed on November 11, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | One Brain | FlashHand |
| --- | --- | --- |
| 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 | Yes |
| Update frequency | **Weekly** | Every 18 months |
| Monetization | Free with in-app purchases | — |
| Size | 10 MB | 31 MB |
| Requires iOS | 15 | **12.0** |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad, iPod |
| Age rating | +4 | 4+ |
| Developer | [Erik Wegener](https://appshunter.io/developer/424482392) | [sekleung chang](https://appshunter.io/developer/867512958) |

## 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


### FlashHand

[App page](https://appshunter.io/ios/app/flashhand-speed-tapping-game/id1447624392)

**In-app purchases:** none


## Frequently asked questions

### Is One Brain free?

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

### Is FlashHand free?

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

### Do One Brain or FlashHand have ads?

Both One Brain and FlashHand show ads.

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

One Brain ships an update weekly, and FlashHand every 18 months. Most recently, One Brain was updated on November 11, 2026 and FlashHand on November 6, 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.*