# Jigendentaku — Calculate with units.

> Calculate with units. (iPhone/iPad app by Fuji Bit LLC..)

- Source: https://appshunter.io/ios/app/jigendentaku/id6765902788 (this page in markdown: same URL + `.md`)
- Developer: [Fuji Bit LLC.](https://appshunter.io/developer/1874205957)
- Category: Utilities, Education
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 17.0 · 4 MB
- Languages: English, French, German, Japanese, Korean, Portuguese, Chinese, Spanish, Chinese
- Released: 2026-05-05
- Data updated: 2026-05-23
- User reviews in markdown: https://appshunter.io/ios/app/jigendentaku/id6765902788/reviews.md

## What is Jigendentaku?

A new kind of calculator that takes units seriously.

Add kg, km/h, kcal to your numbers and just multiply or divide. 60 km/h × 2 h correctly gives you 120 km. 1 kWh ÷ 1 h = 1 kW works naturally too.

Trying to add unrelated units like 3 kg + 5 m? The app politely stops you and offers to switch to multiplication with one tap. You catch the mistake and move on instantly.

Results are shown in relatable scale: 100 kcal is "≈ 0.5 rice bowls", 4.7 GB is "≈ 1 DVD". Numbers regain their meaning.

Features
- Launches with the leading unit of the active category preselected (Mass → kg)
- 9 categories: Mass, Length, Time, Volume, Area, Temperature, Speed, Data, Energy
- SI base units + Celsius/Fahrenheit + binary data units (KiB, GiB)
- Imperial units (in, ft, yd, mi, lb, oz) and US cooking measures (gallon, fl oz, cup)
- Japanese cooking measures (cup, tablespoon, teaspoon)
- Tap "No unit" to use it as a regular calculator
- Smart blocking of dimensionally invalid calculations
- Scale comparison cards beneath every result
- Available in 9 languages

"If you can't measure it, you can't understand it."

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Remove ads | $0.99 | one-time |



## Version history (last 3 releases)

### 2.0 — 2026-05-19

Version 2.0
- Imperial units (in, ft, yd, mi, lb, oz)
- US cooking measures (gallon, fl oz, cup)
- Japanese cooking measures (cup, tablespoon, teaspoon)
- UI now available in 9 languages
- Improved Restore Purchase feedback (progress + outcome message)
- Dedicated "cannot divide by zero" error

### 1.1 — 2026-05-07

We have made some UI changes.

### 1.0 — 2026-05-06

No release notes.

## More apps by Fuji Bit LLC.

- [SUUGAKU](https://appshunter.io/ios/app/suugaku/id6759102221)
- [BUTURAKU](https://appshunter.io/ios/app/buturaku/id6759213255)
- [PAKEDOU](https://appshunter.io/ios/app/pakedou/id6759820254)
- [HARAKU](https://appshunter.io/ios/app/haraku/id6759958253)
- [KORAKU](https://appshunter.io/ios/app/koraku/id6760215571)
- [NETURAKU](https://appshunter.io/ios/app/neturaku/id6760246813)

All apps by Fuji Bit LLC.: https://appshunter.io/developer/1874205957

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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 2026-05-23.*