# Wright Propane vs Rail Model Calc

The clearest difference is ads: Wright Propane at none against Rail Model Calc's shown. Wright Propane also leads on update cadence (every 4 months 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.

Wright Propane ships an update every 4 months, Rail Model Calc every 14 months. The most recent releases landed on September 25, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | Wright Propane | Rail Model Calc |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Every 4 months** | Every 14 months |
| Size | 56 MB | 13 MB |
| Requires iOS | **12.2** | 15.4 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Rural Computer Consultants, Inc.](https://appshunter.io/developer/640795441) | [Nobuyuki Kumakura](https://appshunter.io/developer/1529070760) |

## What reviewers say

### Wright Propane

[App page](https://appshunter.io/ios/app/wright-propane/id6449974833)

**Features:** macOS Compatibility

**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 Wright Propane free?

Wright Propane 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 Wright Propane or Rail Model Calc have ads?

Rail Model Calc shows ads; Wright Propane does not.

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

Wright Propane ships an update every 4 months, and Rail Model Calc every 14 months. Most recently, Wright Propane was updated on September 25, 2026 and Rail Model Calc on October 1, 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.*