# Dual-Calc — Combine two calculators in one

> Dual-calculator app for comparative and complex mathematical operations. (iPhone/iPad app by Jing Li.)

- Source: https://appshunter.io/ios/app/dual-calc/id6443838197 (this page in markdown: same URL + `.md`)
- Developer: [Jing Li](https://appshunter.io/developer/982234327)
- Category: Utilities
- Price: $1.99
- Rating: 5.00/5 from 3 App Store ratings · 1 written reviews indexed
- Age rating: 4+
- Requires: iOS 11.0 · 8 MB
- Languages: English, Japanese, Korean, Chinese, Chinese
- Released: 2022-10-19
- Data updated: 2026-06-10
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/dual-calc/id6443838197/reviews.md

## What is Dual?

Dual-Calc is an efficient, simple and easy-to-use calculator app that combines two calculators into one.
The two calculators are sharing one input keyboard and the calculation process and results are displayed in two separate windows.

This calculator is especially suitable for the following use scenarios:
1. Comparative calculation (for example, when shopping online, we want to calculate and compare the unit price of the same commodity in different stores);
2. A complex mathematical operation in which some expressions in the middle need to be operated first. Through this app, one calculator can calculate the main formula, and the other one can calculate the subformula. The result of the subformula calculation can be directly output to the main formula calculator.
3. Dual-Calc has more powerful functions and more reasonable experience than the system calculator, which can completely replace the system calculator.

【 Features 】
1. Results can be exported from one calculator to another.
2. For the convenience of users, we provide two ways to switch calculators. The only difference between the two ways is whether the results of the previous calculator are automatically brought to the next one during the switching process:
    a. Click on the ⇅(⇋) button, will switch calculator, at the same time the result of the current calculator will be output to the other one.
    b. You can switch calculators by clicking the top two calculators directly, but the calculation results will not be automatically output at this time.
3. Provide standard calculation mode under portrait and rotate the screen to landscape it will become a scientific calculator.
4. Long press the calculation result label to copy it to the system paste board.
5. Support 3D Touch to copy the latest calculation result.

Looking forward to your feedback and suggestions. If you have any questions, please contact us by email.
Email: superkidstudio@163.com

## Key features

- Two calculators in one interface
- Transfer results between calculators
- Standard and scientific modes
- Copy results to clipboard
- 3D Touch support for copying

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/dual-calc/id6443838197/reviews.md

### 5/5 — So simple, yet so useful

*2022-10-24, version 1.0.0*

Does exactly what you expect it to

**Developer response:** Thanks for your use and comments, and we’ll keep developing to support as many useful features as possible while keeping it simple.

## Frequently asked questions about Dual

### What is Dual-Calc?

Dual-Calc is a utility app that combines two calculators into a single interface. It's designed for comparative calculations and complex mathematical operations where intermediate results need to be transferred.

### How does Dual-Calc handle transferring results?

You can transfer results between the two calculators in Dual-Calc in two ways: by clicking the switch button which automatically outputs the current result, or by directly clicking the calculator you wish to switch to, which does not automatically transfer results.

### Does Dual-Calc offer a scientific calculator mode?

Yes, Dual-Calc provides a standard calculation mode in portrait view. When you rotate your device to landscape, it transforms into a scientific calculator.

### How can I copy a calculation result from Dual-Calc?

You can copy a calculation result by long-pressing the result label. Additionally, Dual-Calc supports 3D Touch to quickly copy the latest calculation result.

### What devices is Dual-Calc compatible with?

Dual-Calc is available for iPhone, iPad, and iPod devices. It runs on iOS and supports devices with an age rating of 4+.

### How often is Dual-Calc updated?

The latest version of Dual-Calc is 1.0.5, and it was last updated on September 25, 2023. This indicates a relatively recent update for the application.

### What is the price of Dual-Calc?

Dual-Calc is a paid application and costs $1.99. There are no in-app purchases or advertisements associated with this utility.

### Does Dual-Calc have ads?

No, Dual-Calc does not contain advertisements. It is a paid application that offers an ad-free experience for its users.

## Version history (last 5 releases)

### 1.0.5 — 2023-09-25

- Optimized operation expression display UI.

### 1.0.4 — 2023-03-08

Bug fixed.

### 1.0.3 — 2022-11-22

- All new design App Icon.
- Added vibration and sound feedback when pressing buttons.

### 1.0.2 — 2022-11-09

- Optimizing the UI display.

### 1.0.1 — 2022-10-24

Thank you for using this calculator, we bring the following content to this update:
1. Support 3D Touch to copy the latest calculation result.
2. Audio feedback is provided when switching calculators.
3. Optimized the display effect of scientific calculator keyboard in landscape perspective of iPad device.

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## More apps by Jing Li

- [Dual-Calc Lite](https://appshunter.io/ios/app/dual-calc-lite/id6443996409)
- [VisuDSA](https://appshunter.io/ios/app/visudsa/id6444121522)

All apps by Jing Li: https://appshunter.io/developer/982234327

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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 2026-06-10.*