# Blunami vs Rail Model Calc

The clearest difference is ads: Blunami at none against Rail Model Calc's shown. Blunami also leads on update cadence (fortnightly vs every 14 months) and iOS requirement (12.2 vs 15.4). On price, 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.

Blunami ships an update fortnightly, Rail Model Calc every 14 months. The most recent releases landed on September 9, 2026 and September 13, 2026 respectively.

## The numbers

| Metric | Blunami | Rail Model Calc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (9 ratings)](https://appshunter.io/ios/app/blunami/id6450242596/reviews)** | — |
| Number of ratings | **9** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Fortnightly** | Every 14 months |
| Monetization | Free | — |
| Size | 46 MB | 13 MB |
| Requires iOS | **12.2** | 15.4 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [BlueRail Trains](https://appshunter.io/developer/1108536202) | [Nobuyuki Kumakura](https://appshunter.io/developer/1529070760) |

## What reviewers say

### Blunami

[App page](https://appshunter.io/ios/app/blunami/id6450242596)

Control locomotives equipped with a specific DCC decoder using your mobile device. This application allows for seamless operation of your model trains.

**Highlights:** Locomotive control, DCC decoder compatibility, SoundTraxx Blunami support, Mobile operation

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

**In-app purchases:** none


### Rail Model Calc

[App page](https://appshunter.io/ios/app/rail-model-calc/id6474500872)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Blunami free?

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

### Is Rail Model Calc free?

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

### Do Blunami or Rail Model Calc have ads?

Rail Model Calc shows ads; Blunami does not.

### Which is updated more often, Blunami or Rail Model Calc?

Blunami ships an update fortnightly, and Rail Model Calc every 14 months. Most recently, Blunami was updated on September 9, 2026 and Rail Model Calc on September 13, 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.*