# Calculate+4 -simple calculator — Calculate four simultaneously!

> Calculate four simultaneously! (iPhone/iPad app by Rooking,Inc..)

- Source: https://appshunter.io/ios/app/calculate-plus-4-simple-calculator/id1464624084 (this page in markdown: same URL + `.md`)
- Developer: [Rooking,Inc.](https://appshunter.io/developer/1054334319)
- Category: Utilities, Productivity
- Price: Free
- Age rating: 4+
- Requires: iOS 9.0 · 23 MB
- Languages: English, Japanese
- Released: 2019-06-06
- Data updated: 2026-08-22
- User reviews in markdown: https://appshunter.io/ios/app/calculate-plus-4-simple-calculator/id1464624084/reviews.md

## What is Calculate+4?

I made the concept that, want to use a calculator on a tablet and also want to use a calculator with a simple design.

The buttons are large and easy to touch, and have a simple design. In calculator + 4 we put four calculators on one screen when we turned horizontally.

I think that it is useful in various places if you have to do simultaneous calculation.

[Major features]:
-Simple and easy design
-The button is large and easy to touch
-When turned horizontally, equipped with four calculators can be calculated simultaneously
-For portrait orientation, delete the rightmost value with backspace button
-Percent calculation also possible
-Supports both vertical and horizontal display
-Display comma (,) in every three digits for easy reading of calculation result

Supported Operators:
-Basic operations: +,-, x, ÷,%
-+/- conversion

If you have any comments or suggestions about this app, please contact us anytime


## Version history (last 5 releases)

### 1.0.5 — 2019-11-25

Thank you for always using Calculate + 4.
Fixed minor bugs.

Thanks for the continued support of Calculate + 4.

### 1.0.4 — 2019-10-04

Thank-you for choosing to use Calculate+4.
We would like to let you know that we have added the following functions:
-The icon has been changed.
-Added support for smartphones
-Minor bug fixes
Please continue your favors toward calculator +4.

### 1.0.3 — 2019-08-15

Thank-you for choosing to use Calculate+4.
-Minor bug fixes
Please continue your favors toward calculator +4.

### 1.0.2 — 2019-08-14

Thank-you for choosing to use Calculate+4.
We would like to let you know that we have added the following functions:
-Tutorial screen
-Minor bug fixes
Please continue your favors toward calculator +4.

### 1.0.1 — 2019-06-24

Splash screen has been fixed, screen shot has been changed, and bugs have been fixed.

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All apps by Rooking,Inc.: https://appshunter.io/developer/1054334319

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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 2026-08-22.*