# ReactionTimeChecker

> A game to test and improve your reaction time with online leaderboards. (iPhone/iPad app by NSC, K.K..)

- Source: https://appshunter.io/ios/app/reactiontimechecker/id537191082 (this page in markdown: same URL + `.md`)
- Developer: [NSC, K.K.](https://appshunter.io/developer/501890400)
- Category: Games, Entertainment, Action, Family
- Price: Free
- Rating: 1.00/5 from 1 App Store ratings · 3 written reviews indexed
- Age rating: 4+
- Requires: iOS 15.6 · 22 MB
- Languages: American English
- Released: 2012-07-07
- Data updated: 2026-06-05
- Monetization: ad-supported
- User reviews in markdown: https://appshunter.io/ios/app/reactiontimechecker/id537191082/reviews.md

## What is ReactionTimeChecker?

[What is this game?]
-This game can test your earliness of a reaction(reflexes).

[How to Play]
-First,You can see 25 buttons(5*5).
-When a game starts,any one of the 25 buttons color will change to PINK.
-You TAP the glowing pink button as soon as possible!
-After the game ended, you can see your SCORE and EVALUATION(Japanese KANJI).

[Online Ranking]
This app will automatically upload your play results to the online ranking server.
If you do not agree to the automatic registration on the online ranking server, please refrain from using this app.

The data uploaded to the server is as follows.
1. The name entered on the title screen (If you do not enter the name, it will be automatically registered with the name "unknown".)
2. Play result (average reaction time)

In addition, please check the following privacy policy.
https://www.nscnet.jp/privacyPolicy.html

*If you are using iOS 14.5 or later, a dialog asking for tracking permission will be displayed at the first startup. This setting can be confirmed and changed in the "Settings" app, "Privacy", and "Tracking".


Production: NSC, K.K.
If you have any problems or requests, please check the contents of the “Contact Us” page on our website and send us an e-mail.
Click here for “Contact Us”: https://www.nscnet.jp/inquiry.html

## Key features

- Reaction time testing
- Color-changing button gameplay
- Score and evaluation display
- Online ranking system
- Automatic result upload

## Recent user reviews (3 of 3)

All indexed reviews: https://appshunter.io/ios/app/reactiontimechecker/id537191082/reviews.md

### 5/5 — Excellent

*2024-03-21*

The best reaction trainer. Having very nice reaction, I even didn’t reach the place 300 by ranking.

### 1/5 — Negativity promoting app

*2021-06-28*

Glitchy app which tracks you, and says “horrible” after you click any red box, doesn’t matter how fast. Total negativity

### 1/5 — Not a fit for me

*2019-07-01*

Its just bad but it’s free so try it out maybe it’s good for you

## Frequently asked questions about ReactionTimeChecker

### What is ReactionTimeChecker?

ReactionTimeChecker is a game designed to test your reflexes by having you tap a button as soon as its color changes. It provides a score and an evaluation of your reaction speed.

### How do I play ReactionTimeChecker?

The game presents a 5x5 grid of buttons. When one button turns pink, you must tap it as quickly as possible. Your score and an evaluation are shown after the game ends.

### Does ReactionTimeChecker have online leaderboards?

Yes, ReactionTimeChecker automatically uploads your play results to an online ranking server. Your name (or 'unknown' if not entered) and average reaction time are shared.

### Is ReactionTimeChecker free to play?

Yes, ReactionTimeChecker is available for free. However, it does contain advertisements.

### What devices does ReactionTimeChecker support?

ReactionTimeChecker is supported on iPhone, iPad, and iPod. It is rated for ages 4 and up.

### How often is ReactionTimeChecker updated?

The latest version, 5.1, was released on July 23, 2025. The app was originally released on July 7, 2012, indicating it receives periodic updates.

### Does ReactionTimeChecker have ads?

Yes, ReactionTimeChecker contains advertisements. This is indicated by the 'hasAds' flag being true.

### What is the user sentiment for ReactionTimeChecker?

Based on the provided data, ReactionTimeChecker has a rating of 1.0 stars from 1 rating, suggesting very low user satisfaction.

## Version history (last 5 releases)

### 5.1 — 2025-07-23

- Layout adjustments.
- Fixed bugs.

Supported iOS 15.6 or later from Ver. 5.1.

### 5.0 — 2024-12-15

- If you press the wrong button, 3 seconds will be added to your reaction time as a penalty.
- Visuals have been redesigned.
- Bug fixed.

From Ver. 5.0, the app is now compatible with iOS 14.0 and later.
Please update your OS to enjoy the new version.

### 4.1 — 2023-09-15

Bug fixed.

### 4.0 — 2022-09-12

- Bug fixed.
- Reviewed the ad settings so that minors can use the app with peace of mind.

### 3.9 — 2021-12-05

-Bug fixed.
-Compatible with iOS 12.1 or later.

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## More apps by NSC, K.K.

- [MilkingLesson](https://appshunter.io/ios/app/milkinglesson/id532479176)
- [DeliveryAgent](https://appshunter.io/ios/app/deliveryagent/id544597789)
- [Surprised!ReactionTimeChecker?](https://appshunter.io/ios/app/surprisedreactiontimechecker/id553393907)
- [ToiletPaper.](https://appshunter.io/ios/app/toiletpaper/id566524855)
- [合コン幹事 せきガエる](https://appshunter.io/ios/app/id632405543)

All apps by NSC, K.K.: https://appshunter.io/developer/501890400

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-05.*