# Rail Model Calc vs VVVFスピードメーター

The clearest difference is ads: VVVFスピードメーター at none against Rail Model Calc's shown. VVVFスピードメーター also leads on update cadence (every 4 months vs every 14 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Rail Model Calc ships an update every 14 months, VVVFスピードメーター every 4 months. The most recent releases landed on October 1, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Rail Model Calc | VVVFスピードメーター |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 14 months | **Every 4 months** |
| Size | 13 MB | 125 MB |
| Requires iOS | 15.4 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Nobuyuki Kumakura](https://appshunter.io/developer/1529070760) | [KENJI TAKETO](https://appshunter.io/developer/1696389966) |

## What reviewers say

### Rail Model Calc

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

**Features:** macOS Compatibility

**In-app purchases:** none


### VVVFスピードメーター

[App page](https://appshunter.io/ios/app/vvvf/id6756630954)

**In-app purchases:** none


## Frequently asked questions

### Is Rail Model Calc free?

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

### Is VVVFスピードメーター free?

VVVFスピードメーター is free to download, with no in-app purchases.

### Do Rail Model Calc or VVVFスピードメーター have ads?

Rail Model Calc shows ads; VVVFスピードメーター does not.

### Which is updated more often, Rail Model Calc or VVVFスピードメーター?

Rail Model Calc ships an update every 14 months, and VVVFスピードメーター every 4 months. Most recently, Rail Model Calc was updated on October 1, 2026 and VVVFスピードメーター on October 14, 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.*