# Reaction Time vs 4 Dots Test

The clearest difference is ads: 4 Dots Test at none against Reaction Time's shown. 4 Dots Test also leads on update cadence (every 3 days vs weekly) and iOS requirement (14.0.0 vs 18.0). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Reaction Time sells 1 one-off in-app purchase and 4 Dots Test sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Reaction Time ships an update weekly, 4 Dots Test every 3 days. The most recent releases landed on October 13, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Reaction Time | 4 Dots Test |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Weekly | **Every 3 days** |
| Size | 20 MB | 28 MB |
| Requires iOS | 18.0 | **14.0.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Songyu Li](https://appshunter.io/developer/1228658214) | [KALLUM MARTIN](https://appshunter.io/developer/1896514205) |

## What reviewers say

### Reaction Time

[App page](https://appshunter.io/ios/app/reaction-time-test-and-training/id6544800564)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime Pass | $0.99 | one-time |


### 4 Dots Test

[App page](https://appshunter.io/ios/app/4-dots-test/id6783995476)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 4 Dots Test Pro | $1.99 | one-time |


## Frequently asked questions

### Is Reaction Time free?

Reaction Time is free to download, with in-app purchases available.

### Is 4 Dots Test free?

4 Dots Test is free to download, with in-app purchases available.

### Do Reaction Time or 4 Dots Test have ads?

Reaction Time shows ads; 4 Dots Test does not.

### Which is updated more often, Reaction Time or 4 Dots Test?

Reaction Time ships an update weekly, and 4 Dots Test every 3 days. Most recently, Reaction Time was updated on October 13, 2026 and 4 Dots Test on October 5, 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.*