# ReactionTimeChecker vs Fast Reflex

The clearest difference is review sentiment: Fast Reflex at 100% against ReactionTimeChecker's 33%. Fast Reflex also leads on rating (4.5 vs 1.0) and ads (none vs shown). ReactionTimeChecker's advantage is price (Free vs $0.99) and in-app purchases (none vs 1). On device support there is nothing between them.

ReactionTimeChecker is free to download; Fast Reflex costs $0.99 up front. Fast Reflex sells 1 one-off in-app purchase. ReactionTimeChecker asks for nothing beyond the download.

Fast Reflex holds the better App Store score, 4.5 against 1.0. That said, the two scores are not equally well evidenced: Fast Reflex has 47 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 33% of ReactionTimeChecker's written reviews are positive against 100% of Fast Reflex's.

ReactionTimeChecker ships an update every 7 months, Fast Reflex every 2 weeks. The most recent releases landed on October 3, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | ReactionTimeChecker | Fast Reflex |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/reactiontimechecker/id537191082/reviews) | **[4.5 (47 ratings)](https://appshunter.io/ios/app/fast-reflex-test-your-brain/id1426315814/reviews)** |
| Number of ratings | 1 | **47** |
| Positive reviews | 33.3% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 7 months | **Every 2 weeks** |
| Monetization | **Ad-supported** | Paid |
| Size | 22 MB | 76 MB |
| Requires iOS | 15.6 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [NSC, K.K.](https://appshunter.io/developer/501890400) | [Radoslaw Kubas](https://appshunter.io/developer/1643306872) |

## What reviewers say

### ReactionTimeChecker

[App page](https://appshunter.io/ios/app/reactiontimechecker/id537191082)

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.

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

**Features:** macOS Compatibility

**In-app purchases:** none


### Fast Reflex

[App page](https://appshunter.io/ios/app/fast-reflex-test-your-brain/id1426315814)

This game challenges your reaction speed and hand-eye coordination with precise testing down to a millionth of a second. Compete globally on leaderboards and explore unique tests to boost focus and dexterity.

**Highlights:** Precise reflex testing, Global leaderboards, Telepathy test, Enhances focus and dexterity, Simple interface, Quick mental exercises

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $0.99 | one-time |


## Frequently asked questions

### Is ReactionTimeChecker free?

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

### Is Fast Reflex free?

Fast Reflex costs $0.99, and also offers in-app purchases.

### Which has better reviews, ReactionTimeChecker or Fast Reflex?

Fast Reflex is rated higher. ReactionTimeChecker averages 1.0 out of 5 from 1 ratings, while Fast Reflex averages 4.5 from 47 ratings.

### Do ReactionTimeChecker or Fast Reflex have ads?

ReactionTimeChecker shows ads; Fast Reflex does not.

### Which is updated more often, ReactionTimeChecker or Fast Reflex?

ReactionTimeChecker ships an update every 7 months, and Fast Reflex every 2 weeks. Most recently, ReactionTimeChecker was updated on October 3, 2026 and Fast Reflex on October 9, 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.*