# Rail Model Track Calc vs TrainNavigator

The clearest difference is in-app purchases: Rail Model Track Calc at none against TrainNavigator's 1. TrainNavigator's advantage is ads (none vs shown) and update cadence (every 4 days vs every 18 months). On price and device support there is nothing between them.

Both are free to download. TrainNavigator sells 1 in-app purchase, starting at $7.99 per year. Rail Model Track Calc asks for nothing beyond the download.

Rail Model Track Calc ships an update every 18 months, TrainNavigator every 4 days. The most recent releases landed on November 3, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | Rail Model Track Calc | TrainNavigator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.0 (2 ratings)](https://appshunter.io/ios/app/rail-model-track-calc/id1529070758/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 18 months | **Every 4 days** |
| Monetization | Ad-supported | — |
| Size | 9 MB | 28 MB |
| Requires iOS | 15.4 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Nobuyuki Kumakura](https://appshunter.io/developer/1529070760) | [Michal Kajaba](https://appshunter.io/developer/987937761) |

## 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


### TrainNavigator

[App page](https://appshunter.io/ios/app/trainnavigator/id6738654983)

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| TrainNavigator Premium | $7.99 | per year |


## Frequently asked questions

### Is Rail Model Track Calc free?

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

### Is TrainNavigator free?

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

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

Rail Model Track Calc shows ads; TrainNavigator does not.

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

Rail Model Track Calc ships an update every 18 months, and TrainNavigator every 4 days. Most recently, Rail Model Track Calc was updated on November 3, 2026 and TrainNavigator on October 3, 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.*