# TimeCalcX vs Rail Model Calc

The clearest difference is update cadence: TimeCalcX at every 6 months against Rail Model Calc's every 14 months. On price, ads, 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.

TimeCalcX ships an update every 6 months, Rail Model Calc every 14 months. The most recent releases landed on October 27, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | TimeCalcX | Rail Model Calc |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | **Every 6 months** | Every 14 months |
| Size | 6 MB | 13 MB |
| Requires iOS | **15.0** | 15.4 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [koji kamogawa](https://appshunter.io/developer/1488210713) | [Nobuyuki Kumakura](https://appshunter.io/developer/1529070760) |

## What reviewers say

### TimeCalcX

[App page](https://appshunter.io/ios/app/timecalcx/id1505984516)

**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 TimeCalcX free?

TimeCalcX 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 TimeCalcX or Rail Model Calc have ads?

Both TimeCalcX and Rail Model Calc show ads.

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

TimeCalcX ships an update every 6 months, and Rail Model Calc every 14 months. Most recently, TimeCalcX was updated on October 27, 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.*