# Concentrate! vs Reaction Time Test

Concentrate! and Reaction Time Test both sit at 4.4 stars, but that hides the real split: 83% of Concentrate!'s written reviews are positive against 33% of Reaction Time Test's. Concentrate! also leads on ads (none vs shown) and monetization model (free vs ad-supported). Reaction Time Test's advantage is update cadence (every 4 days vs every 3 months) and ratings volume (73 vs 5). On price, rating, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 4.4 for Concentrate! against 4.5 for Reaction Time Test. That said, the two scores are not equally well evidenced: Reaction Time Test has 73 ratings behind it against 5, so its average is the more settled of the two. Written reviews are what separate them: 83% of Concentrate!'s written reviews are positive against 33% of Reaction Time Test's.

Concentrate! ships an update every 3 months, Reaction Time Test every 4 days. The most recent releases landed on October 4, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Concentrate! | Reaction Time Test |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.4 (5 ratings)](https://appshunter.io/ios/app/concentrate/id490393546/reviews) | **[4.5 (73 ratings)](https://appshunter.io/ios/app/reaction-time-test-how-fast/id6466617945/reviews)** |
| Number of ratings | 5 | **73** |
| Positive reviews | **83.3% of reviews** | 33.3% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 3 months | **Every 4 days** |
| Monetization | **Free** | Ad-supported |
| Size | 9 MB | 30 MB |
| Requires iOS | **8.0** | 14.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [norbert nagy](https://appshunter.io/developer/328221395) | [HUNG-PIN YU](https://appshunter.io/developer/963095666) |

## What reviewers say

### Concentrate!

[App page](https://appshunter.io/ios/app/concentrate/id490393546)

Test and improve your focus and reaction time with a color-matching game.  The objective is to correctly identify if the displayed color word matches its font color, aiming for speed and accuracy.

**Highlights:** Color word-font color matching, Tests concentration, Measures reaction speed, Game Center Leaderboards, Single-player mode

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

**In-app purchases:** none


### Reaction Time Test

[App page](https://appshunter.io/ios/app/reaction-time-test-how-fast/id6466617945)

Measure your reflexes by tapping as quickly as possible when a visual cue appears. Compete against yourself and challenge your personal best.

**Highlights:** Reaction time measurement, Tap when green cue appears, Challenge personal limits, Simple gameplay

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Concentrate! free?

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

### Is Reaction Time Test free?

Reaction Time Test is free to download, with no in-app purchases.

### Which has better reviews, Concentrate! or Reaction Time Test?

Reaction Time Test is rated higher. Concentrate! averages 4.4 out of 5 from 5 ratings, while Reaction Time Test averages 4.5 from 73 ratings.

### Do Concentrate! or Reaction Time Test have ads?

Reaction Time Test shows ads; Concentrate! does not.

### Which is updated more often, Concentrate! or Reaction Time Test?

Concentrate! ships an update every 3 months, and Reaction Time Test every 4 days. Most recently, Concentrate! was updated on October 4, 2026 and Reaction Time Test on October 24, 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.*