# Twin Calculator -Multi-function calculator-

> Dual calculator with formula display and constant registration. (iPhone/iPad app by R.E.O. Factory.)

- Source: https://appshunter.io/ios/app/twin-calculator-multi-function-calculator/id1021097277 (this page in markdown: same URL + `.md`)
- Developer: [R.E.O. Factory](https://appshunter.io/developer/435344117)
- Category: Productivity, Utilities
- Price: Free
- Rating: 1.00/5 from 1 App Store ratings · 1 written reviews indexed
- Age rating: 4+
- Requires: iOS 8.0 · 4 MB
- Languages: American English, Japanese
- Released: 2015-07-28
- Data updated: 2026-06-04
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/twin-calculator-multi-function-calculator/id1021097277/reviews.md

## What is Twin Calculator?

■ Overview
· This app can do two calculations at the same time.
- At the same time you can display two calculators.
· You can register the display and constant formula, they are useful calculator.

■ function
1. Two calculator
To perform multiple calculations simultaneously in that there are two calculator, it can be conveniently used in various situations.

2. formula display
You can batch calculation from entering the formula. It is easy to understand and difficult to mistake the formula display type computer. It corresponds to the expression using the brackets.

3. constant registration
Two constants registration is possible. You can easily calculate the tax amount at the time of shopping.

## Key features

- Two calculators for simultaneous calculations
- Formula display for clear input
- Constant registration for quick access
- Supports bracket expressions
- Easy tax calculation

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/twin-calculator-multi-function-calculator/id1021097277/reviews.md

### 1/5 — Calculator?

*2015-12-16*

If you like calculators that can't do problems with % or anything like 10-.5 (it crashes) then you'll love this one

## Frequently asked questions about Twin Calculator

### Does Twin Calculator have ads?

Twin Calculator is ad-free, providing an uninterrupted calculation experience.

### What devices does Twin Calculator support?

Twin Calculator is available on iPhone, iPad, and iPod devices.

### How often is Twin Calculator updated?

Twin Calculator was last updated on April 17, 2016, with version 1.0.2.

### What is the age rating for Twin Calculator?

Twin Calculator has an age rating of 4+, making it suitable for a wide range of users.

### Can Twin Calculator handle complex formulas with brackets?

Yes, Twin Calculator supports expressions using brackets, allowing for more complex formula input and calculation.

### What is the user rating for Twin Calculator?

Twin Calculator has a rating of 1.0 stars based on 1 rating.

### Can Twin Calculator be used for tax calculations?

Yes, Twin Calculator allows for the registration of two constants, which can be easily used to calculate tax amounts, for example, when shopping.

## Version history (last 3 releases)

### 1.0.2 — 2016-04-17

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

Bug fix

### 1.0.1 — 2016-03-02

Fixed some bugs

### 1.0.0 — 2015-07-28

No release notes.

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## More apps by R.E.O. Factory

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All apps by R.E.O. Factory: https://appshunter.io/developer/435344117

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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 2026-06-04.*