# ざっくり換算 vs VOLTsボルツ・電工システム屋計算・現場便利ツール

The clearest difference is in-app purchases: ざっくり換算 at none against VOLTsボルツ・電工システム屋計算・現場便利ツール's 1. VOLTsボルツ・電工システム屋計算・現場便利ツール's advantage is update cadence (daily vs every 2 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. VOLTsボルツ・電工システム屋計算・現場便利ツール sells 1 one-off in-app purchase. ざっくり換算 asks for nothing beyond the download.

ざっくり換算 ships an update every 2 months, VOLTsボルツ・電工システム屋計算・現場便利ツール daily. The most recent releases landed on October 30, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | ざっくり換算 | VOLTsボルツ・電工システム屋計算・現場便利ツール |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 2 months | **Daily** |
| Size | 4 MB | 9 MB |
| Requires iOS | 16.6 | 16.6 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Masayuki Sato](https://appshunter.io/developer/1741867656) | [TAKAO OGASAWARA](https://appshunter.io/developer/1895349758) |

## What reviewers say

### ざっくり換算

[App page](https://appshunter.io/ios/app/id6738019109)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### VOLTsボルツ・電工システム屋計算・現場便利ツール

[App page](https://appshunter.io/ios/app/volts/id6767616532)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 広告を削除 | $3.99 | one-time |


## Frequently asked questions

### Is ざっくり換算 free?

ざっくり換算 is free to download, with no in-app purchases.

### Is VOLTsボルツ・電工システム屋計算・現場便利ツール free?

VOLTsボルツ・電工システム屋計算・現場便利ツール is free to download, with in-app purchases available.

### Do ざっくり換算 or VOLTsボルツ・電工システム屋計算・現場便利ツール have ads?

Both ざっくり換算 and VOLTsボルツ・電工システム屋計算・現場便利ツール show ads.

### Which is updated more often, ざっくり換算 or VOLTsボルツ・電工システム屋計算・現場便利ツール?

ざっくり換算 ships an update every 2 months, and VOLTsボルツ・電工システム屋計算・現場便利ツール daily. Most recently, ざっくり換算 was updated on October 30, 2026 and VOLTsボルツ・電工システム屋計算・現場便利ツール on October 25, 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.*