# Seren Sillafu vs RailFocus

The clearest difference is in-app purchases: Seren Sillafu at none against RailFocus's 1. Seren Sillafu also leads on iOS requirement (12.0 vs 16.4). RailFocus's advantage is update cadence (weekly vs every 91 months). On price, ads and device support there is nothing between them.

Both are free to download. RailFocus sells 1 one-off in-app purchase. Seren Sillafu asks for nothing beyond the download.

Seren Sillafu ships an update every 91 months, RailFocus weekly. The most recent releases landed on October 29, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Seren Sillafu | RailFocus |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 91 months | **Weekly** |
| Size | 64 MB | 57 MB |
| Requires iOS | **12.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Atebol Cyfyngedig](https://appshunter.io/developer/957818356) | [Joseph Halls](https://appshunter.io/developer/6792848111) |

## What reviewers say

### Seren Sillafu

[App page](https://appshunter.io/ios/app/seren-sillafu/id1063836768)

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 Seren Sillafu free?

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

### Is RailFocus free?

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

### Do Seren Sillafu or RailFocus have ads?

Neither Seren Sillafu nor RailFocus shows ads.

### Which is updated more often, Seren Sillafu or RailFocus?

Seren Sillafu ships an update every 91 months, and RailFocus weekly. Most recently, Seren Sillafu was updated on October 29, 2026 and RailFocus on October 25, 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.*