# Calculator Pro basic — Customize button & Wallpaper

> Highly customizable calculator with adjustable buttons, appearance, and calculation modes. (iPhone/iPad app by Kenichi Yoshikawa.)

- Source: https://appshunter.io/ios/app/calculator-pro-basic/id1042600645 (this page in markdown: same URL + `.md`)
- Developer: [Kenichi Yoshikawa](https://appshunter.io/developer/954163256)
- Category: Utilities, Productivity
- Price: Free
- Rating: 5.00/5 from 1 App Store ratings · 6 written reviews indexed
- Age rating: 4+
- Requires: iOS 8.0 · 7 MB
- Languages: American English, Arabic, French (France), German (Germany), Hindi, Italian, Japanese, Korean, European Portuguese, Russian and 3 more
- Released: 2015-10-11
- Data updated: 2026-08-03
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/calculator-pro-basic/id1042600645/reviews.md

## What is Calculator Pro basic?

Calculator Pro basic can change the position and the function of the button and set the wallpaper background freely, not to mention the color and the shape.
Optimized to multitasking function of iOS.You can easy to call this app in a "Split View" or "Slide Over".

The screen layout will change automatically according to the portrait or landscape mode on your iPad and iPhone and the big buttons fitted to the size and mode of display are easy to view for the user.
Try to create your own calculator suitable for your tastes by using abundant setting well.

FEATURES :

Calculation :
- Two Calculation method : functional or sequential
- Three rounding mode : rounding , up or cut
- Number of digits after the decimal point : free , zero , one , two , three or four
- Angle unit : degree or radian

Appearance :
- Color or Wallpaper : Set the wallpaper with a photograph or a camera, or select a background color
- Number Format : Select a digit grouping and decimal point from among the 8 types including India format
- Sound of buttons : Select the button sound from nine timbres or turn off

Result:
- Character color：Freely set color by the slider
- Background color：Freely set color and opacity by the slider
- Expression color：Freely set color or hide by the slider

Button :
- Shape : Square , Round Square , Circle , Diamond , Heart or Cogwheel
- Size : Large , Medium or Small
- Dimensions : Flat , Solid or Outline
- Character color：Freely set color by the slider
- Background color：Freely set color and opacity by the slider
- Position : The position of buttons are freely changed
- Function button : Three function buttons can be changed, thease button is include Grand total, Rand, Sine,1/x, Route, etc...

History :
- Equals : Over write last result or Add the result the history
- Vertical (portrait) mode : Indication Left , Hidden or Indication Right
- Horizontal (landscape) mode : Indication place Left or Right
- character color：Freely set color by the slider
- background color：Freely set color and opacity by the slider
- Expression color：Freely set color or hide by the slider

SUPPORTS :

Non retina and Retina display on iPhone, iPad and iPod Touch.
iPhone 4 to 8 plus, iPhone SE, iPhone X, iPad 2 to iPad Pro and iPad mini to iPad mini 4 , iPod touch 3gen and later.
iOS 8.0 and later.

## Key features

- Customizable button shapes, colors, and positions
- Set custom wallpaper backgrounds
- Multiple calculation methods and rounding modes
- Adjustable decimal places and angle units
- History log with display options
- Supports portrait and landscape modes

## Recent user reviews (6 of 6)

All indexed reviews: https://appshunter.io/ios/app/calculator-pro-basic/id1042600645/reviews.md

### 4/5 — 並行利用できるできる

*2023-06-15, version 3.0.0*

iPadでよく使っています。それまで使っていたアプリは画面の大きさが変えられませんでした。不便なのでこのアプリに替えたところ、たとえばインターネットをしながら手元で計算することもできるようになりました。ボタンが大きく見やすいのも気に入っています。

### 5/5 — マルチタスク

*2016-07-27, version 1.2.6*

いくつか電卓アプリを探してこちらはマルチタスクで利用できたので問題なしです。

### 5/5 — とても使いやすい

*2016-06-16, version 1.2.5*

ボタンが大きく使いやすいです、アイコンが面白いけどボタンの取替えを表しているのですね。
設定が多くて戸惑いましたが、簡単に使えるところが気に入りました。

### 5/5 — 使いやすい

*2016-06-10, version 1.2.4*

ボタンが移動できる点がよいと思う。
電卓はよく使うので自分なりに使いやすく変えられることや、入力した式が見やすいのが非常に気に入っている。
ボタンの音が出るようになったのもいい。

### 5/5 — デコできていーです。

*2015-12-05, version 1.2.2*

自分専用の電卓ができてとっても使いやすいです。

### 5/5 — 重宝してます

*2015-11-11, version 1.2.2*

iPadだと横のすみに取り出せてほんとに便利
よく使ってます

## Frequently asked questions about Calculator Pro basic

### Does Calculator Pro basic have ads?

Calculator Pro basic is ad-free, allowing for an uninterrupted user experience without advertisements.

### What calculation methods does Calculator Pro basic support?

Calculator Pro basic offers two calculation methods: functional and sequential. It also supports three rounding modes (rounding, up, or cut) and allows free selection of the number of digits after the decimal point.

### Can I change the appearance of Calculator Pro basic?

Yes, Calculator Pro basic offers extensive appearance customization. You can set custom wallpapers, choose from nine button sounds, and freely adjust the color and opacity of results, backgrounds, and expressions.

### What button customization options are available in Calculator Pro basic?

Calculator Pro basic allows you to change button shapes (Square, Circle, Heart, etc.), size, dimensions, character color, background color, and even their position on the screen. You can also change the function of three specific buttons.

### Is Calculator Pro basic optimized for multitasking on iOS?

Yes, Calculator Pro basic is optimized for multitasking functions on iOS, allowing it to be easily called in 'Split View' or 'Slide Over' modes for efficient use alongside other applications.

### How does Calculator Pro basic handle history?

The history feature in Calculator Pro basic can either overwrite the last result or add the result to the history. The display of history can be adjusted for vertical (portrait) and horizontal (landscape) modes, with options for character and background colors.

### What devices and iOS versions are compatible with Calculator Pro basic?

Calculator Pro basic supports non-retina and retina displays on iPhone, iPad, and iPod Touch. It is compatible with iOS 8.0 and later, and runs on devices from iPhone 4 to iPhone X, and iPad 2 to iPad Pro.

### What is the user rating for Calculator Pro basic?

Calculator Pro basic has a perfect rating of 5.0 stars based on 1 review, indicating a highly positive user reception.

## Version history (last 5 releases)

### 3.0.0 — 2017-10-10

This app has been updated by Apple to display the Apple Watch app icon.

Added support for iPhone X, 8 , 8 Plus And iOS 11

### 2.0.0 — 2016-09-21

Added support for iPhone 7, 7 Plus and iOS10.

### 1.2.6 — 2016-06-17

a small bug fixed.

### 1.2.5 — 2016-06-14

Adjust the display size of the Grand total.

### 1.2.4 — 2016-06-09

Changed position of the setting icon of the iPad.

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## More apps by Kenichi Yoshikawa

- [Calculator basic :](https://appshunter.io/ios/app/calculator-basic/id959434104)
- [System Status -](https://appshunter.io/ios/app/system-status/id989442029)
- [System Status Lite -](https://appshunter.io/ios/app/system-status-lite/id992911130)
- [Customize Calculator](https://appshunter.io/ios/app/customize-calculator/id1042492126)

All apps by Kenichi Yoshikawa: https://appshunter.io/developer/954163256

## Related topics

[kenichi yoshikawa](https://appshunter.io/ios/topics/kenichi-yoshikawa)

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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 2026-08-03.*