# Acierno vs Rail

The clearest difference is update cadence: Rail at every 2 weeks against Acierno's every 4 months. Acierno's advantage is iOS requirement (16.4 vs 26.0). 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.

Acierno ships an update every 4 months, Rail every 2 weeks. The most recent releases landed on September 19, 2026 and September 16, 2026 respectively.

## The numbers

| Metric | Acierno | Rail |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 weeks** |
| Size | 84 MB | 11 MB |
| Requires iOS | **16.4** | 26.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Sitrap srl](https://appshunter.io/developer/1228070136) | [Francesco Pio Paradiso](https://appshunter.io/developer/1805346498) |

## What reviewers say

### Acierno

[App page](https://appshunter.io/ios/app/acierno/id6444362369)

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

**In-app purchases:** none


### Rail

[App page](https://appshunter.io/ios/app/rail/id6755895103)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Acierno free?

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

### Is Rail free?

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

### Do Acierno or Rail have ads?

Neither Acierno nor Rail shows ads.

### Which is updated more often, Acierno or Rail?

Acierno ships an update every 4 months, and Rail every 2 weeks. Most recently, Acierno was updated on September 19, 2026 and Rail on September 16, 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.*