# CalculatorDU - for daily use — Useful calculator

> A free, simple calculator app for daily arithmetic with value storage and verification. (iPhone/iPad app by HAPPYCODE INC.)

- Source: https://appshunter.io/ios/app/calculatordu-for-daily-use/id1523401381 (this page in markdown: same URL + `.md`)
- Developer: [HAPPYCODE INC](https://appshunter.io/developer/1470911180)
- Category: Utilities
- Price: Free with in-app purchases
- Rating: 4.80/5 from 14 App Store ratings
- Age rating: 4+
- Requires: iOS 13.0 · 90 MB
- Languages: American English, French (France), German (Germany), Hindi, Japanese, Korean, European Portuguese, Russian, Chinese (Simplified, China), European Spanish and 1 more
- Released: 2020-08-08
- Data updated: 2026-09-03
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/calculatordu-for-daily-use/id1523401381/reviews.md

## What is CalculatorDU?

A simple, free calculator app. It provides basic calculation, value storage, and verification.

# Arithmetic operations
Perform addition, subtraction, multiplication, division, and square root operations.

# Save value
Input values and calculated values can be saved for later use.

# Check
You can verify the calculation process.

# Copy and paste
You can copy and paste numerical values.

# Operation symbols
You can select multiplication and division symbols.

# Numerical display format
You can select decimal points, delimiters, and split digit groups.

# Digits
Displays up to 21 digits for calculations.

# Language
You can change the display language.

# Orientation
Works in both portrait and landscape modes.

## Key features

- Basic arithmetic operations
- Value storage and retrieval
- Calculation verification
- Copy and paste functionality
- Customizable numerical display
- Portrait and landscape modes

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Hide ads | $2.99 | one-time |



## Frequently asked questions about CalculatorDU

### Does CalculatorDU have ads?

Yes, CalculatorDU contains advertisements. This is common for free utility applications that offer in-app purchases.

### What devices does CalculatorDU support?

CalculatorDU is available on iPhone, iPad, and iPod touch. It is designed for iOS devices.

### How many digits can CalculatorDU display?

CalculatorDU can display up to 21 digits for calculations, accommodating a wide range of numerical inputs and outputs.

### Can I save my calculations in CalculatorDU?

Yes, you can save both input values and calculated results for later use within CalculatorDU.

### What is the age rating for CalculatorDU?

CalculatorDU has an age rating of 4+, making it suitable for a broad audience of users.

### How often is CalculatorDU updated?

The latest version of CalculatorDU is 1.18.0, and it was last updated on October 22, 2025. Updates typically include improvements and bug fixes.

### Can I change the display language in CalculatorDU?

Yes, CalculatorDU allows you to change the display language, offering a more personalized user experience.

### What arithmetic operations does CalculatorDU support?

CalculatorDU supports basic arithmetic operations including addition, subtraction, multiplication, division, and square root calculations.

## Version history (last 5 releases)

### 1.18.0 — 2025-10-22

Security updates have been implemented.

### 1.17.6 — 2025-07-18

Bug fixed.

### 1.15.0 — 2023-06-30

Bug fixed.

### 1.14.2 — 2022-12-06

Bug fixed.

### 1.12.0 — 2022-07-31

Bug fixed.

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## More apps by HAPPYCODE INC

- [CrowWalking](https://appshunter.io/ios/app/crowwalking/id1539086667)
- [SwapNumbers - Math puzzle](https://appshunter.io/ios/app/swapnumbers-math-puzzle/id1603391248)
- [ClockLesson - Learn by touch](https://appshunter.io/ios/app/clocklesson-learn-by-touch/id1640611945)

All apps by HAPPYCODE INC: https://appshunter.io/developer/1470911180

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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 2026-09-03.*