# Rail Model Track Calc vs Blunami

The clearest difference is review sentiment: Blunami at 100% against Rail Model Track Calc's 0%. Blunami also leads on rating (4.7 vs 1.0) and ads (none vs shown). 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 holds the better App Store score, 4.7 against 1.0. That said, the two scores are not equally well evidenced: Blunami has 10 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 0% of Rail Model Track Calc's written reviews are positive against 100% of Blunami's.

Rail Model Track Calc ships an update every 18 months, Blunami every 2 weeks. The most recent releases landed on October 24, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Rail Model Track Calc | Blunami |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.0 (2 ratings)](https://appshunter.io/ios/app/rail-model-track-calc/id1529070758/reviews) | **[4.7 (10 ratings)](https://appshunter.io/ios/app/blunami/id6450242596/reviews)** |
| Number of ratings | 2 | **10** |
| Positive reviews | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 18 months | **Every 2 weeks** |
| Monetization | Ad-supported | **Free** |
| Size | 9 MB | 50 MB |
| Requires iOS | 15.4 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Nobuyuki Kumakura](https://appshunter.io/developer/1529070760) | [BlueRail Trains](https://appshunter.io/developer/1108536202) |

## What reviewers say

### Rail Model Track Calc

[App page](https://appshunter.io/ios/app/rail-model-track-calc/id1529070758)

Easily calculate horizontal and vertical dimensions for diagonal railroad model track layouts. Input track length and angle to get precise measurements for combining different track pieces. Avoid guesswork and ensure accurate model railway construction.

**Highlights:** Calculate horizontal and vertical track lengths, Input track length and angle, Precise measurements in 0.5 mm increments, Error margin less than 0.5mm, Reset function for calculations, Designed for railroad modeling hobbyists

**Features:** macOS Compatibility

**In-app purchases:** none


### 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


## Frequently asked questions

### Is Rail Model Track Calc free?

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

### Is Blunami free?

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

### Which has better reviews, Rail Model Track Calc or Blunami?

Blunami is rated higher. Rail Model Track Calc averages 1.0 out of 5 from 2 ratings, while Blunami averages 4.7 from 10 ratings.

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

Rail Model Track Calc shows ads; Blunami does not.

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

Rail Model Track Calc ships an update every 18 months, and Blunami every 2 weeks. Most recently, Rail Model Track Calc was updated on October 24, 2026 and Blunami on October 12, 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.*