# 1000digit Calc — calculator with 1,000-digits

> calculator with 1,000-digits (iPhone/iPad app by Yukihiro Shioya.)

- Source: https://appshunter.io/ios/app/1000digit-calc/id6463856899 (this page in markdown: same URL + `.md`)
- Developer: [Yukihiro Shioya](https://appshunter.io/developer/1565306192)
- Category: Productivity, Utilities
- Price: Free
- Age rating: 4+
- Requires: iOS 15.0 · 5 MB
- Languages: English, Japanese
- Released: 2023-10-23
- Data updated: 2026-05-17
- User reviews in markdown: https://appshunter.io/ios/app/1000digit-calc/id6463856899/reviews.md

## What is 1000digit Calc?

This is a calculator that can perform four arithmetic operations on integers up to about 1,000 digits.
You can use parentheses in formulas, so you can calculate in the same order as in the formula.
Calculation results are saved to the clipboard each time, so they can be reused in other applications.


## Version history (last 5 releases)

### 2.3 — 2023-11-08

Fixed a bug that caused incorrect prime number determination for 1-digit and 2-digit integers

### 2.2 — 2023-11-03

2.2
Fixed a bug that caused crashes due to overflow, etc

### 2.1 — 2023-10-24

ver2.1
Review of the logic for determining prime numbers

### 2.0 — 2023-10-23

2.0(2)
Added prime number determination function.

### 1.0 — 2023-10-02

No release notes.

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## More apps by Yukihiro Shioya

- [Number Place Class](https://appshunter.io/ios/app/number-place-class/id1565306190)
- [KidsNumberPlace](https://appshunter.io/ios/app/kidsnumberplace/id1576343365)
- [MakeColor](https://appshunter.io/ios/app/makecolor/id1580467591)
- [MemoforShopping](https://appshunter.io/ios/app/memoforshopping/id1586039232)
- [FollowCards](https://appshunter.io/ios/app/followcards/id1591107423)
- [TangledString](https://appshunter.io/ios/app/tangledstring/id1596545427)

All apps by Yukihiro Shioya: https://appshunter.io/developer/1565306192

## Related topics

[35000/25600](https://appshunter.io/ios/topics/35000-25600)

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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 2026-05-17.*