# 4 Dots Test vs RailFocus

The clearest difference is iOS requirement: 4 Dots Test at 14.0.0 against RailFocus's 16.4. On price, update cadence, ads and in-app purchases there is nothing between them.

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

4 Dots Test ships an update every 3 days, RailFocus every 5 days. The most recent releases landed on October 5, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | 4 Dots Test | RailFocus |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 3 days** | Every 5 days |
| Size | 28 MB | 56 MB |
| Requires iOS | **14.0.0** | 16.4 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [KALLUM MARTIN](https://appshunter.io/developer/1896514205) | [Joseph Halls](https://appshunter.io/developer/6792848111) |

## What reviewers say

### 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 |


### RailFocus

[App page](https://appshunter.io/ios/app/railfocus-train-driver-test/id6792848109)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| RailFocus Plus | $9.99 | one-time |


## Frequently asked questions

### Is 4 Dots Test free?

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

### Is RailFocus free?

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

### Do 4 Dots Test or RailFocus have ads?

Neither 4 Dots Test nor RailFocus shows ads.

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

4 Dots Test ships an update every 3 days, and RailFocus every 5 days. Most recently, 4 Dots Test was updated on October 5, 2026 and RailFocus on September 30, 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.*