# Reaction Time vs UruSainen

The clearest difference is update cadence: Reaction Time at fortnightly against UruSainen's every 2 months. Reaction Time also leads on iOS requirement (15.0 vs 18.0). On price, ads, 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.

Reaction Time ships an update fortnightly, UruSainen every 2 months. The most recent releases landed on October 30, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | Reaction Time | UruSainen |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.7 (3 ratings)](https://appshunter.io/ios/app/reaction-time-tap-test/id1580161727/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 68.1% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | **Fortnightly** | Every 2 months |
| Monetization | Ad-supported | — |
| Size | 60 MB | 23 MB |
| Requires iOS | **15.0** | 18.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Osawa Shunsuke](https://appshunter.io/developer/477431394) | [Yasuhiro Hamada](https://appshunter.io/developer/1825750232) |

## What reviewers say

### Reaction Time

[App page](https://appshunter.io/ios/app/reaction-time-tap-test/id1580161727)

Test and train your reflexes with various game modes. Compete globally in periodic rankings to become the world champion. Ideal for improving reaction speed for emergencies.

**Highlights:** One-shot reflex games, Random appearance challenges, 3 consecutive reflex tests, Global player rankings, Periodic ranking resets, Reflex training for emergencies

**Features:** Vision Pro support

**In-app purchases:** none


### UruSainen

[App page](https://appshunter.io/ios/app/urusainen/id6756487439)

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

**In-app purchases:** none


## Frequently asked questions

### Is Reaction Time free?

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

### Is UruSainen free?

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

### Do Reaction Time or UruSainen have ads?

Both Reaction Time and UruSainen show ads.

### Which is updated more often, Reaction Time or UruSainen?

Reaction Time ships an update fortnightly, and UruSainen every 2 months. Most recently, Reaction Time was updated on October 30, 2026 and UruSainen on October 22, 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.*