# Big Number Calculator+

> Calculator for large numbers with advanced formatting and file loading. (iPhone/iPad app by Kunio Takeuchi.)

- Source: https://appshunter.io/ios/app/big-number-calculator-plus/id1541255205 (this page in markdown: same URL + `.md`)
- Developer: [Kunio Takeuchi](https://appshunter.io/developer/851499887)
- Category: Education, Utilities
- Price: Free
- Rating: 3.70/5 from 3 App Store ratings · 2 written reviews indexed
- Age rating: 4+
- Requires: iOS 13.0 · 19 MB
- Languages: American English, Japanese
- Released: 2020-11-26
- Data updated: 2026-06-04
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/big-number-calculator-plus/id1541255205/reviews.md

## What is Big Number Calculator+?

“Big Number Calculator+” is an application that can calculate very large numbers.
The format that can be used is decimal (integer). The calculation functions that can be used are addition, subtraction, multiplication, and division. The number of digits is limited to 66000 digits. Only plus signs can be used. Minus signs cannot be used.
 The calculation engine used in the calculation can be selected from “Swift” and “Objective-C”. You can also view the source code of the calculation engine. Please use at your own risk.
 Only numerical values ​​(1,2,3,4,5,6,7,8,9,0) are extracted from the input data. You can optionally enter non-numeric characters. It can be used as a delimiter.
 It can be load from a file in addition to direct input.
 Input data and calculation results are automatically formatted for printing and saving. The save file is saved in text format (.txt).

"Big Number Calculator"  for macOS is also available.


Main Specifications
• iOS 13 and iPadOS 13 or later

Main functions

Maximum number of digits of input data
• 66000 digits

Calculation function
• Addition, subtraction, multiplication, division
  The algorithm uses the "brush calculation method".
  The division is displayed as “quotient and remainder".

Calculation engine
• “Swift” and “Objective-C” can be selected.

Numeric format
• Decimal number (integer)
  Only the plus sign can be used as the sign. Minus signs cannot be used.

Numerical input
• Only numerical values ​​(1,2,3,4,5,6,7,8,9,0) are extracted.
• Characters other than numerical values ​​can be entered in the option settings. Can be used as a delimiter.

Load from file
• The file types that can be load are "txt, rtf, rtfd".

Data replacement and registration
• Input data and calculation results can be replaced by dragging and dropping.
  It can also be registered in the register.

Separation
• Separate with the selected delimiter (comma and space).
• Separate by the selected number of separation digits (3, 6, 10, 16, 24).
  Any number of separation digits can be entered.

Printing
• Input data and calculation results are automatically formatted.

Save
• Input data and calculation results are automatically formatted.
• The file format is text (.txt) format.

Source code
• The source code of the calculation engine can be displayed.
  Please use at your own risk.

## Key features

- Handles up to 66,000 digits
- Addition, subtraction, multiplication, division
- Selectable calculation engines (Swift, Objective-C)
- Load data from files (txt, rtf, rtfd)
- Automatic data formatting for printing and saving
- Customizable number separators

## Recent user reviews (2 of 2)

All indexed reviews: https://appshunter.io/ios/app/big-number-calculator-plus/id1541255205/reviews.md

### 3/5 — Well

*2025-09-27*

So the app thinks that 1,440 is 144,0 which is strange considering it’s a calculator

### 3/5 — Add exponent support

*2023-06-26*

Please add exponent support also I cannot figure out how to work it please help me

## Frequently asked questions about Big Number Calculator+

### What is the maximum number of digits Big Number Calculator+ can handle?

Big Number Calculator+ can handle a maximum of 66,000 digits for input data and calculations. This allows for operations on extremely large numbers that standard calculators cannot manage.

### What calculation functions does Big Number Calculator+ offer?

Big Number Calculator+ supports addition, subtraction, multiplication, and division. The division function displays both the quotient and remainder.

### Can I load numbers into Big Number Calculator+ from a file?

Yes, you can load numerical data into Big Number Calculator+ from text files (.txt), rich text format (.rtf), and rich text format with attachments (.rtfd). This feature streamlines input for large datasets.

### Does Big Number Calculator+ support negative numbers?

Big Number Calculator+ currently only supports positive numbers. Only plus signs can be used as the sign indicator; minus signs are not supported in calculations.

### How does Big Number Calculator+ format its output?

Input data and calculation results are automatically formatted for printing and saving. You can also customize number separation with selected delimiters and digits.

### What calculation engines can I choose in Big Number Calculator+?

You can select between two calculation engines: 'Swift' and 'Objective-C'. The source code for these engines is also available for viewing, though use is at your own risk.

### Is Big Number Calculator+ available on other platforms?

A version of Big Number Calculator is also available for macOS. This iOS and iPadOS version is designed for mobile devices.

### How often is Big Number Calculator+ updated?

The latest version of Big Number Calculator+ is 1.3.1, last updated on March 19, 2026. This indicates a recent update, suggesting ongoing support and potential for future improvements.

## Version history (last 5 releases)

### 1.3.1 — 2026-03-19

• Supported iPhone 17e and iPad Air 8th generation.

### 1.3.0 — 2025-11-26

1. Now supports iOS 26 and iPadOS 26.
2. Now supports iPhone 17, iPhone 17 Pro, iPhone 17 Pro Max, iPhone Air, iPad Pro 13 (13" 8th generation), and iPad Pro 13 (11" 8th generation).

### 1.2.4 — 2025-03-15

• Added support for “iPhone 16e”, “iPad A16 11th generation”, “iPad Air M3 11-inch” and “iPad Air M3 13-inch”.

### 1.2.3 — 2024-11-01

• Support for iPad mini 7th generation.

### 1.2.2 — 2024-09-27

1. Supported iOS 18 and iPadOS 18.
2. Supports for iPhone 16, iPhone 16 Plus, iPhone 16 Pro and iPhone 16 Pro Max.

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## More apps by Kunio Takeuchi

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All apps by Kunio Takeuchi: https://appshunter.io/developer/851499887

## Related topics

[BIG NUMBERS APP](https://appshunter.io/ios/topics/big-numbers-app)

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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.*