# Concentration Grid vs Reaction time trainer

The clearest difference is price: Reaction time trainer at Free against Concentration Grid's $0.99. Reaction time trainer also leads on ratings volume (294 vs 7) and rating (4.5 vs 4.3). Concentration Grid's advantage is ads (none vs shown) and update cadence (every 4 weeks vs every 2 months). On review sentiment, in-app purchases and device support there is nothing between them.

Reaction time trainer is free to download; Concentration Grid costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Reaction time trainer holds the better App Store score, 4.5 against 4.3. That said, the two scores are not equally well evidenced: Reaction time trainer has 294 ratings behind it against 7, so its average is the more settled of the two. Written reviews complicate that: 57% of Concentration Grid's written reviews are positive against 54% of Reaction time trainer's, so the app with the better star average is not the one people write more warmly about.

Concentration Grid ships an update every 4 weeks, Reaction time trainer every 2 months. The most recent releases landed on October 14, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | Concentration Grid | Reaction time trainer |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | [4.3 (7 ratings)](https://appshunter.io/ios/app/concentration-grid/id1066366174/reviews) | **[4.5 (294 ratings)](https://appshunter.io/ios/app/reaction-time-trainer-rs/id1198194881/reviews)** |
| Number of ratings | 7 | **294** |
| Positive reviews | **57.1% of reviews** | 53.6% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Every 4 weeks** | Every 2 months |
| Monetization | Paid | **Ad-supported** |
| Best chart rank | **#68** | — |
| Size | 14 MB | 8 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [STALWART GROUP LLC](https://appshunter.io/developer/1066366173) | [Masaharu Tsukamoto](https://appshunter.io/developer/939316877) |

## What reviewers say

### Concentration Grid

[App page](https://appshunter.io/ios/app/concentration-grid/id1066366174)

**Currently charting:** #68 Top Paid · Sports (US App Store)

This app offers a digital version of a mental focus grid exercise. Players tap numbers in sequential order within a grid, aiming for the fastest completion time. It's designed to enhance focus, concentration, and mental stamina.

**Highlights:** Sequential number tapping, Timed performance tracking, Adjustable grid sizes (3x3 to 14x14), Competitive challenge, Performance improvement tracking, Leaderboard integration

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

**In-app purchases:** none


### Reaction time trainer

[App page](https://appshunter.io/ios/app/reaction-time-trainer-rs/id1198194881)

Enhance your reflexes with a quick reaction test. Tap as many targets as possible within a 30-second timeframe. This training app is perfect for improving performance in games and sports, allowing you to compete with others.

**Highlights:** Reaction speed test, Tap targets quickly, 30-second challenges, Game Center login, Global rankings

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

**In-app purchases:** none

**What reviewers like**

- 👍 Effective aim trainer
- 👍 Improves reaction time
- 👍 Simple and effective
- 👍 Fun and addictive
- 👍 Good for stress relief

**What reviewers complain about**

-  광고 Excessive ads
- 広告 Ads interrupt gameplay
- 広告 Ads appear too frequently
- 広告 Ads are distracting
- 広告 Ads are intrusive

**Reported bugs**

- Targets spawn too close
- Buttons overlap and are hard to see
- Game lags or has visual glitches
- Game requires internet connection
- Fake ad rewards

**Requested features**

- More game modes and challenges
- Leaderboard fixes for cheaters
- Option to disable ads (paid)
- Horizontal screen support
- Better timing for ad displays


## Frequently asked questions

### Is Concentration Grid free?

Concentration Grid costs $0.99, with no in-app purchases.

### Is Reaction time trainer free?

Reaction time trainer is free to download, with no in-app purchases.

### Which has better reviews, Concentration Grid or Reaction time trainer?

Reaction time trainer is rated higher. Concentration Grid averages 4.3 out of 5 from 7 ratings, while Reaction time trainer averages 4.5 from 294 ratings.

### Do Concentration Grid or Reaction time trainer have ads?

Reaction time trainer shows ads; Concentration Grid does not.

### Which is updated more often, Concentration Grid or Reaction time trainer?

Concentration Grid ships an update every 4 weeks, and Reaction time trainer every 2 months. Most recently, Concentration Grid was updated on October 14, 2026 and Reaction time trainer on October 20, 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.*