# Rail vs HydraTrain

The clearest difference is ads: Rail at none against HydraTrain's shown. HydraTrain's advantage is update cadence (every 2 days vs every 2 weeks). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Rail ships an update every 2 weeks, HydraTrain every 2 days. The most recent releases landed on September 16, 2026 and September 15, 2026 respectively.

## The numbers

| Metric | Rail | HydraTrain |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 2 weeks | **Every 2 days** |
| Size | 11 MB | 5 MB |
| Requires iOS | **26.0** | 26.2 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Francesco Pio Paradiso](https://appshunter.io/developer/1805346498) | [Federico Sebastiani](https://appshunter.io/developer/1801020587) |

## What reviewers say

### Rail

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

**Features:** macOS Compatibility

**In-app purchases:** none


### HydraTrain

[App page](https://appshunter.io/ios/app/hydratrain/id6757862682)

**In-app purchases:** none


## Frequently asked questions

### Is Rail free?

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

### Is HydraTrain free?

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

### Do Rail or HydraTrain have ads?

HydraTrain shows ads; Rail does not.

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

Rail ships an update every 2 weeks, and HydraTrain every 2 days. Most recently, Rail was updated on September 16, 2026 and HydraTrain on September 15, 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.*