# ざっくり換算 — "一風変った" 計算尺

> "一風変った" 計算尺 (iPhone/iPad app by Masayuki Sato.)

- Source: https://appshunter.io/ios/app/id6738019109 (this page in markdown: same URL + `.md`)
- Developer: [Masayuki Sato](https://appshunter.io/developer/1741867656)
- Category: Utilities
- Price: Free
- Age rating: 4+
- Requires: iOS 16.6 · 4 MB
- Languages: American English, Japanese
- Released: 2024-11-10
- Data updated: 2026-05-15
- User reviews in markdown: https://appshunter.io/ios/app/id6738019109/reviews.md

## What is ざっくり換算?

When calculating something on your smartphone, entering each number one by one can be quite a hassle.
This app eliminates the need to enter numbers when you want to convert.
It's useful when you want to quickly get a rough calculation result.

"New Conversion Method Proposal Q&A"

Q1: How is this different from using a calculator?
A1: With a calculator, you press each number key one by one.
You have to be careful not to press the wrong key...
If you use "Rough Conversion," it's easy: just align the red indicator with the scale and the converted value will appear.

Q2: When repeating similar conversions, it's a hassle to have to re-enter numbers multiple times...
A2: With "Rough Conversion," you can just slide the indicator along the scale and "see consecutive conversion results immediately."

Q3: But it can't do a variety of calculations, right?
A3: It can't do a variety of calculations like a calculator.
However, if you register the conversions you frequently use in advance, you can use the "Rough Conversion" function to create something like your own "personal slide rule."

[Features]
- Easily convert values ​​without having to enter them yourself; simply slide your finger across the red indicator on the panel.
- Quickly see approximate calculations.
- You can freely customize the units you want to convert in advance.
- You can also switch the conversion range, allowing you to convert over a wide or narrow range.
- You can also freely set the title of the app's conversion screen.
- The values ​​and units you set in the settings screen will remain the same the next time you launch the app.

* The default setting is "tsubo" ←→ "m2" when converting land area. This can be freely customized.
* The first time you use the app, please press Reset on the "Settings" screen.
- You can freely register and save the conversions you want.
・You can easily use the app by simply tapping the title you want to use from the list of registered conversions to switch between them.
・You can freely change or delete registered conversion data at any time.

・You can also save registered conversion data on iCloud, so you can carry over your conversion data if you change your device.
・The registered list of conversion values ​​comes with several conversion patterns pre-loaded as examples (such as length and area conversions).
*Please feel free to change or delete them as you like.
*Conversion example data is automatically installed when you download this app for the first time.
*If you are already using the app, the registered conversion value list may not be displayed even after updating.
If this happens, please delete the app from your device and then download it again.


## Version history (last 5 releases)

### 2.5 — 2026-03-21

- Minor corrections made

### 2.4 — 2025-12-13

- Minor corrections made

### 2.3 — 2025-09-14

・軽微な修正を行いました

### 2.2 — 2025-09-13

・軽微な修正を行いました

### 2.1 — 2025-06-15

・ご使用される地域によって、英語表記に対応しました

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## More apps by Masayuki Sato

- [給油メモ。](https://appshunter.io/ios/app/id6498873730)
- [くじら尺](https://appshunter.io/ios/app/id6498873952)
- [曲尺](https://appshunter.io/ios/app/id6498873960)
- [my俳句](https://appshunter.io/ios/app/my/id6711330917)
- [my短歌](https://appshunter.io/ios/app/my/id6730115853)

All apps by Masayuki Sato: https://appshunter.io/developer/1741867656

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-05-15.*