# functionCalculator

> Mathematical function calculator for exact fractional and decimal results. (iPhone/iPad app by Jirou Fukuda.)

- Source: https://appshunter.io/ios/app/functioncalculator/id1275985289 (this page in markdown: same URL + `.md`)
- Developer: [Jirou Fukuda](https://appshunter.io/developer/689603483)
- Category: Education, Productivity
- Price: Free
- Rating: 4.30/5 from 6 App Store ratings
- Age rating: 4+
- Requires: iOS 10.3 · 6 MB
- Languages: American English, Japanese
- Released: 2017-08-28
- Data updated: 2026-06-01
- Monetization: ad-supported
- User reviews in markdown: https://appshunter.io/ios/app/functioncalculator/id1275985289/reviews.md

## What is functionCalculator?

Calculate the value of the mathematical function y = f (x). It is possible to assign to x any integer, rational number, irrational number. For example, you can assign square root 2 to x. It is not necessary to fix it to decimal. The calculation result is output in the form of a fraction using square root. It is exactly the same as math calculations. You can also convert the result to decimal. Calculate the values ​​of f (α) and f (β) for two kinds of values, x = α and x = β, and f (α) + f (β), f (α) - f ), F (α) * f (β), f (α) / f (β) can also be calculated.

## Key features

- Calculate function values for any number type
- Display results as exact fractions
- Convert results to decimal
- Perform operations on two input values
- Supports irrational numbers


## Frequently asked questions about functionCalculator

### What kind of numbers can I use for x in functionCalculator?

functionCalculator allows you to input any integer, rational number, or irrational number for x. This includes values like the square root of 2, which can be represented exactly without fixing it to a decimal.

### How does functionCalculator display calculation results?

The app outputs calculation results in the form of a fraction using square roots, providing exact mathematical representations. You also have the option to convert these results to decimal form.

### Can functionCalculator perform operations on multiple input values?

Yes, functionCalculator supports calculating the values of f(α) and f(β) for two different input values, alpha and beta. It can then compute their sum, difference, product, and quotient.

### What is the age rating for functionCalculator?

functionCalculator has an age rating of 4+, making it suitable for a wide range of users, including younger students learning mathematical concepts.

### Does functionCalculator have ads?

Yes, functionCalculator contains advertisements. As it is free to use, ads are displayed to support the app's development and maintenance.

### On which devices can I use functionCalculator?

functionCalculator is available for iPhone and iPod devices. It is designed to run on Apple's mobile operating systems.

### How often is functionCalculator updated?

The latest version of functionCalculator is 1.5, which was last updated on March 19, 2021. Updates typically address bugs and introduce minor improvements.

### What is the learning methodology of functionCalculator?

functionCalculator focuses on exact mathematical computation, allowing users to explore function values with precise fractional and square root representations. This aids in understanding the exact nature of mathematical operations rather than approximations.

## Version history (last 5 releases)

### 1.5 — 2021-03-19

bug fixed.

### 1.4 — 2020-05-08

bug fixed.

### 1.3 — 2018-09-29

bug fix.

### 1.2 — 2018-09-28

Fixed bug that is not divided.

### 1.1 — 2017-08-31

bug fix.

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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)
- [RationalNumberCalculator](https://appshunter.io/ios/app/rationalnumbercalculator/id998791093)
- [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

[jirou fukuda](https://appshunter.io/ios/topics/jirou-fukuda) · [inratio](https://appshunter.io/ios/topics/inratio) · [the math keyboard](https://appshunter.io/ios/topics/the-math-keyboard)

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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 2026-06-01.*