ReactionTimeChecker vs RotoTap
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
ReactionTimeChecker
Test your reflexes by tapping a color-changing button as quickly as possible. Compete with others through online leaderboards and receive an evaluation of your performance.
- Reaction time testing
- Color-changing button gameplay
- Score and evaluation display
- Online ranking system
- Automatic result upload
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[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
RotoTap
This game challenges your perception by requiring you to tap the color of the word, not the word itself. Score points and bonuses for quick, correct taps, but be mindful of time penalties for errors. It's a simple concept that quickly becomes surprisingly difficult.
- Tap the color of the word
- Avoid being fooled by the word itself
- Score points and bonuses
- Earn bonus time for correct taps
- Time penalties for incorrect taps
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The rules are simple: Look at the color of the word in the center of the circle and tap that color. Don't be fooled by the word itself. It's the color of the word that matters. Sounds simple? You'll be surprised at how challenging it is. You score 10 points plus a bonus for each correct tap, but you have to be quick. The bonus drops quickly to 0 if you wait too long. You also get additional time added for every correct tap. If you tap the wrong color a time penalty is taken.
Screenshots
Verdict
The clearest difference is update cadence: ReactionTimeChecker at every 7 months against RotoTap's every 45 months. RotoTap's advantage is iOS requirement (12.0 vs 15.6). On price, ads, in-app purchases and monetization model there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
ReactionTimeChecker ships an update every 7 months, RotoTap every 45 months. The most recent releases landed on October 23, 2026 and October 24, 2026 respectively.
| Parameter | ReactionTimeChecker | RotoTap |
|---|---|---|
| Price | Free | Free |
| Rating | 1.0 (1 ratings) — better | — |
| Positive reviews | 33.3% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 7 months — better | Every 45 months |
| Ads | Yes | Yes |
| In-app purchases | No | No |
| Monetization | Ad-supported | Ad-supported |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.6 | 12.0 — better |
| Further details — not scored | ||
| Size | 22 MB | 23 MB |
| Age rating | 4+ | 4+ |
| Developer | NSC, K.K. | Ingemar Bergmark |
In-app purchases
ReactionTimeChecker
No in-app purchases
RotoTap
No in-app purchases









