Twin-Calc

Name: Twin-Calc
Price: 1.99 USD
Author: Hiroyuki Ueda

By: Hiroyuki Ueda

Two calculators are in One App

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Features & Capabilities

Available at a discounted price until January 30.

A simple and easy-to-use calculator app that combines two calculators into one.

Calculators are displayed side by side when the screen is horizontal, and vertically when the screen is vertical.

In addition to being able to perform separate calculations with each calculator, calculation results can be also copy and paste with one touch, so you can perform other calculations during calculations, making it even more convenient to use than you might imagine.

There is also a free version with ads. Please try it first. https://apps.apple.com/jp/app/t-calc-lite/id1630026837?l=jp

【feature】

Calculation results can be copy and paste between two calculators with one touch.
The result calculated can be input from one calculator to the other with one touch. ・When press the "→" key, the calculation result of the left calculator is entered at the end of the formula on the right calculator. ・When press the "←" key, the calculation result of the right calculator is entered at the end of the formula on the left calculator.
add, subtract, multiply and divide is performed. Do multiplication and division first, then add and subtract.
Display the formula The entered formula is displayed under the result, so you can easily check the operations.
Calculation results can be copied to iPhone’s memory Calculation results can be pasted into other apps as text , so transcription errors will not occur.

Example of use When you find a product for 988 yen for 3 pieces and a product for 1245 yen for 4 pieces while shopping, you can easily calculate "Which is cheaper?" And “How cheaper?"with this calculator.

Use the left and right calculators to find the unit price of the product (unit price = product price/number).
Tap the "- key" and "arrow key" on either the left or right calculator to calculate the unit price difference.

Limitations ・Answer can be calculated up to 9 digits, minimum 0.000000001.

Note The free version can be downloaded from https://apps.apple.com/jp/app/t-calc-lite/id1630026837?l=en

User Growth & Download Statistics

App

By:

Hiroyuki Ueda

Version:

2.7.4 Last updated: 2026-01-15

Version code:

881518447

Creation date:

2022-04-16

Compatible devices:

Size:

817.00KB

Price:

1.99

URLs:

Website ,Privacy policy

Full description:

Source:

Apple Apps Store

Data ingested on:

2026-06-07

Compare stats and ranking:

Ranking

# 1,466,592 ▼ 40,387

For Developers

Monetize with App Pass Boost with Extension Booster

Contact the developer

Chrome-Stats does not own this Apple app. Please use these information below to contact the Apple app developer.

Developed by:

Hiroyuki Ueda

Apple Apps Store

https://apps.apple.com/ar/app/twin-calc/id1619292082?l=en-GB

Website:

https://twincalc.jp/

User Reviews

This is a very useful app. The only thing missing is the ability to use it without turning my phone. Please add support for portrait orientation.

by jo*****, 2022-09-22

The idea seems simple of having two calculators, but the result of how they work together is superior. The ability to calculate two things side by side is helpful when comparing prices, performing complex conversions, validating finances, etc. Wonderful idea, pure genius!

by Ra*****, 2022-09-21

What a novel concept. On the surface it seems redundant but after considering how often we use math and I find myself pulling up the calculator I realized just how amazingly efficient this calculator layout is. Simply a brilliant idea turned into a wonderfully useful app that will save me a ton of time in day to day life!