# TapReaction vs One Brain

The clearest difference is review sentiment: One Brain at 59% against TapReaction's 0%. One Brain also leads on update cadence (weekly vs every 26 months) and rating (4.4 vs 4.0). TapReaction's advantage is in-app purchases (none vs 1) and ads (none vs shown). On price there is nothing between them.

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

One Brain holds the better App Store score, 4.4 against 4.0. That said, the two scores are not equally well evidenced: One Brain has 297 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 0% of TapReaction's written reviews are positive against 59% of One Brain's.

TapReaction ships an update every 26 months, One Brain weekly. The most recent releases landed on October 4, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | TapReaction | One Brain |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (1 ratings)](https://appshunter.io/ios/app/tapreaction/id337462568/reviews) | **[4.4 (297 ratings)](https://appshunter.io/ios/app/one-brain/id1229367064/reviews)** |
| Number of ratings | 1 | **297** |
| Positive reviews | 0.0% of reviews | **58.6% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 26 months | **Weekly** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 5 MB | 10 MB |
| Requires iOS | **12.4** | 15 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | +4 |
| Developer | [Lars Bergelt](https://appshunter.io/developer/294176951) | [Erik Wegener](https://appshunter.io/developer/424482392) |

## What reviewers say

### TapReaction

[App page](https://appshunter.io/ios/app/tapreaction/id337462568)

Train and test your reflexes by tapping colors or numbers as quickly as possible. Choose board size and game duration to challenge your reaction speed in various modes.

**Highlights:** Reaction time testing, Color and Number modes, Customizable board size, Adjustable game time, High score lists, GameCenter support

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

**In-app purchases:** none


### 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


## Frequently asked questions

### Is TapReaction free?

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

### Is One Brain free?

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

### Which has better reviews, TapReaction or One Brain?

One Brain is rated higher. TapReaction averages 4.0 out of 5 from 1 ratings, while One Brain averages 4.4 from 297 ratings.

### Do TapReaction or One Brain have ads?

One Brain shows ads; TapReaction does not.

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

TapReaction ships an update every 26 months, and One Brain weekly. Most recently, TapReaction was updated on October 4, 2026 and One Brain on October 13, 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.*