# RationalNumberCalculator

> Calculator for fraction arithmetic and decimal-to-fraction conversions. (iPhone/iPad app by Jirou Fukuda.)

- Source: https://appshunter.io/ios/app/rationalnumbercalculator/id998791093 (this page in markdown: same URL + `.md`)
- Developer: [Jirou Fukuda](https://appshunter.io/developer/689603483)
- Category: Education, Business
- Price: Free
- Rating: 5.00/5 from 6 App Store ratings · 44 written reviews indexed
- Age rating: 4+
- Requires: iOS 11.0 · 4 MB
- Languages: American English, Japanese
- Released: 2015-06-17
- Data updated: 2026-06-26
- Monetization: ad-supported
- User reviews in markdown: https://appshunter.io/ios/app/rationalnumbercalculator/id998791093/reviews.md

## What is RationalNumberCalculator?

It is a calculator for a fraction calculation.　We will do the four arithmetic operations of fraction and fraction, decimal and fraction.  The results can be displayed decimal, improper fraction,  mixed fraction.

## Key features

- Fraction arithmetic
- Decimal and fraction operations
- Four arithmetic operations
- Display results as decimal
- Display results as improper fraction
- Display results as mixed fraction

## Recent user reviews (10 of 44)

All indexed reviews: https://appshunter.io/ios/app/rationalnumbercalculator/id998791093/reviews.md

### 5/5 — 存在してくれてありがとう

*2026-06-14, version 2.51*

ありがとう

### 5/5 — 計算しやすい！

*2025-01-21, version 2.51*

帯分数も仮分数も計算出来て、小数の問題もできるのでめちゃくちゃ使ってます!!

### 5/5 — ➖や➕が欲しい

*2025-01-10, version 2.51*

あ

### 5/5 — 勉強が捗る！

*2023-05-29, version 2.51*

分数の計算も出来て、小数の計算も出来るので本当に使いやすいです！

### 3/5 — 分数もあるし計算しやすい

*2023-03-06, version 2.51*

❣️

### 1/5 — 計算ミス？

*2023-01-17, version 2.4*

計算の答えが間違っていた。
93.72÷3.3が28.399999999...になっていた。だから他も間違っているかもしれない

### 5/5 — 最高です！！！！

*2021-11-19, version 2.4*

大好き😘😘😘😘！！！！

### 3/5 — 計算はできるけど…

*2021-07-22, version 2.4*

分数の計算もできるということで入れてみました。

正確に答えが出るし、めんどくさい分数の計算もできていいと思いました！

ただ、「-」や「+」が入った計算もしたいので、（   ）が使える機能があると便利なので、
その方が嬉しいです。あと、ボタンを押し間違えるとまた計算したい数字を打たなければ入れないので、「ひとつ戻る」みたいなボタンがあると嬉しいです。

これからも使わせていただきたいと思っています。よろしくお願いします🙇‍♂️

### 5/5 — このアプリを使って

*2021-06-24, version 2.4*

学校での宿題で自信がなくこのアプリで丸つけをしてまちがえたところをもう一度計算して直したところテストで高得点が取れました

### 4/5 — 先頭マイナスの数値が入れられません

*2021-02-20, version 2.2*

子供の面倒な分数計算確認用に使わせていただいています。
とても良くできていて、入力もすぐに慣れる使いやすさでおすすめです。
一点、マイナスの数字ではじまる値を入れる事ができません。まだ足し算なので後ろにずらして対応してますが、掛け算割り算の時に子供が困る事があるかもな。と思っていますので、対応していただけると嬉しいです。
よろしくお願いします。

## Frequently asked questions about RationalNumberCalculator

### What operations can RationalNumberCalculator perform?

RationalNumberCalculator supports the four basic arithmetic operations: addition, subtraction, multiplication, and division. It can handle calculations involving fractions, decimals, and mixed fractions.

### What formats can RationalNumberCalculator display results in?

Results from RationalNumberCalculator can be displayed in multiple formats, including decimal, improper fraction, and mixed fraction. This flexibility aids in understanding and presenting mathematical outcomes.

### Is RationalNumberCalculator suitable for learning math?

Yes, RationalNumberCalculator is designed for educational purposes, allowing users to practice and verify fraction calculations. Its ability to show results in different formats can be a valuable learning tool.

### What devices is RationalNumberCalculator available on?

RationalNumberCalculator is available for iPhone, iPad, and iPod devices. It is designed to run on Apple's iOS ecosystem.

### How often is RationalNumberCalculator updated?

The latest version of RationalNumberCalculator is 2.51, which was last updated on January 27, 2023. Updates typically address performance improvements and bug fixes.

### What is the age rating for RationalNumberCalculator?

RationalNumberCalculator has an age rating of 4+, making it suitable for a wide range of users, including young students learning basic arithmetic.

### Does RationalNumberCalculator have ads?

Yes, RationalNumberCalculator contains advertisements. As it is a free application, ads are displayed to support its continued development and availability.

### What is the user sentiment for RationalNumberCalculator?

Based on the available data, RationalNumberCalculator has received overwhelmingly positive feedback, with a rating of 5.0 stars from 6 ratings. This suggests a high level of user satisfaction.

## Version history (last 5 releases)

### 2.51 — 2023-01-27

bug fixed.

### 2.4 — 2021-03-19

bug fixed.

### 2.2 — 2020-05-06

bug fixed.

### 2.1 — 2018-10-19

bug fixed.

### 2.0 — 2018-09-27

Corresponds to mixed fraction.

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## More apps by Jirou Fukuda

- [gDraw](https://appshunter.io/ios/app/gdraw/id689603480)
- [gDrawLite](https://appshunter.io/ios/app/gdrawlite/id792288727)
- [gDrawPro](https://appshunter.io/ios/app/gdrawpro/id907360838)
- [tripleCalculator](https://appshunter.io/ios/app/triplecalculator/id1141789970)
- [SquareRootCalculator](https://appshunter.io/ios/app/squarerootcalculator/id1260411892)

All apps by Jirou Fukuda: https://appshunter.io/developer/689603483

## Related topics

[rationalnumbercalculator](https://appshunter.io/ios/topics/rationalnumbercalculator) · [jirou fukuda](https://appshunter.io/ios/topics/jirou-fukuda) · [rational](https://appshunter.io/ios/topics/rational)

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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 2026-06-26.*