# Calculator HD: Big Buttons — Basic calc with history & tape

> Free, large, and easy-to-use basic calculator app for iPad. (iPhone/iPad app by Studio Zebra.)

- Source: https://appshunter.io/ios/app/calculator-hd-big-buttons/id1082193416 (this page in markdown: same URL + `.md`)
- Developer: [Studio Zebra](https://appshunter.io/developer/388549605)
- Category: Utilities, Productivity
- Price: Free
- Rating: 4.50/5 from 1,687 App Store ratings · 213 written reviews indexed
- Age rating: 4+
- Requires: iOS 15.0 · 7 MB
- Languages: American English, Japanese
- Released: 2016-02-15
- Data updated: 2026-09-10
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/calculator-hd-big-buttons/id1082193416/reviews.md

## What is Calculator HD?

Calculator, unit converter, and bill splitter in one iPad app

Calculator
Basic arithmetic plus percentage, sign toggle, and saved calculation history. Long-press the total to copy it.

Unit Converter
Convert length (cm/inch/m/ft), weight (g/kg/lb/oz), temperature (Celsius/Fahrenheit), area (square meters/tsubo/tatami), and data storage (MB/GB/TB) — right from the calculator screen.

Split Bill
Enter the total and the number of people to instantly see each person's share, including service charge or tip.

Handy for travel, shopping abroad, apartment hunting, and everyday life.

## Key features

- Large, easy-to-read display
- User-friendly controls
- Basic calculations
- Free to use

## What do users think of Calculator HD?

Overall sentiment: positive

**Pros**

- 👍 Easy to use
- 👍 Large, clear numbers
- 👍 Simple and straightforward
- 👍 Great for basic calculations
- 👍 Convenient on iPad
- 👍 User-friendly

**Cons**

- 🐛 Decimal point issues
- 🐛 Inaccurate percentage calculations
- 💡 Lack of history/memory
- 💡 No backspace/undo function
- 🔍 Ads can be distracting

**Commonly reported bugs**

- Decimal point not working properly
- Incorrect percentage calculations

**Most requested features**

- Add backspace/undo function
- Improve decimal point and percentage calculations
- Provide option to remove ads

## Recent user reviews (10 of 213)

All indexed reviews: https://appshunter.io/ios/app/calculator-hd-big-buttons/id1082193416/reviews.md

### 1/5 — Change

*2026-08-25, version 1.4*

Not enjoying the new format ….preferred the old. Go figure!

### 5/5 — Happy with new calculator format

*2026-08-17, version 1.3*

Really like how this newer version works!

### 5/5 — Does What It's Expected to Do

*2026-08-07, version 1.2*

I've used several calculator apps and this one has been quite useful and simple to use, like a calculator app should be.

### 4/5 — Free calculator app

*2026-06-30, version 1.2*

Useful calculator app, could be more user friendly if you can look up the previous numbers entered

### 5/5 — A+

*2026-06-20, version 1.2*

LfjfheisdhcxnsuidZAjd

### 5/5 — Easy as ever

*2026-06-15, version 1.2*

Fast and accurate! Very easy to use👌👌👌👌

### 5/5 — How good it is

*2026-05-25, version 1.2*

I didn’t have a calculator app before and it was free and it helped me out a lot! My brother asked hard questions and he also said I have to use a calculator app to do the answer, and I didn’t have the calculator app to do it so it was a challenge and this app looks amazing for a calculator! That’s why I wanted it!

### 5/5 — Great Basic Calculator

*2026-04-23, version 1.2*

This is a great basic calculator for those who don’t need calculus features!  Deleted the others who wanted to charge you for ‘simple’ math and other functions the typical person would ever use!

### 5/5 — Thanks again it works great does a great job. My iPod didn’t have one

*2026-04-20, version 1.2*

Have one on it thanks again. Calvin Charlie

### 5/5 — USER FRIENDLY

*2026-04-18, version 1.2*

Great for basic calculations…fast and easy!

## Frequently asked questions about Calculator HD

### What does this calculator app do?

This app is a free calculator designed specifically for the iPad. It focuses on providing a large, easy-to-read interface for performing basic mathematical calculations quickly and efficiently.

### What are the key features of this calculator app?

The app features a large and clear display that is easy to read. It also boasts user-friendly controls, making it simple to use right away for basic calculations. It is offered completely free of charge.

### Is this calculator app free to use?

Yes, this calculator app is completely free to download and use. There are no hidden costs, in-app purchases, or advertisements associated with its use.

### What devices is this calculator app compatible with?

This calculator app is designed for and compatible with iPads. Its interface and functionality are optimized for the iPad's screen size and touch capabilities.

### What are common use cases for this app?

This app is ideal for everyday tasks requiring simple arithmetic, such as balancing a checkbook, splitting bills, or performing quick calculations for shopping. Its large display makes it convenient for users who prefer a more visible interface.

## Version history (last 5 releases)

### 1.5 — 2026-08-26

- Split View support — use the calculator side by side with other apps
- Refined button layout

Thanks for all your feedback — please keep it coming.

### 1.4 — 2026-08-19

- Adjusted the layout
- Currency now follows your region setting
- Thousands separators while typing

### 1.3 — 2026-08-10

Our simple calculator has grown into an all-in-one calculator packed with useful new features.

■ Unit Converter
- Convert length (cm/inch/m/ft), weight (g/kg/lb/oz), temperature (℃/℉), area (m²/tsubo/tatami), and data storage (MB/GB/TB) — all without leaving the calculator.

■ Split Bill
- Just enter the total and the number of people to instantly see each person's share, including service charge or tip.

■ Calculation History Now Saved
- Your calculation history is no longer lost when you close the app.
- Tap any entry to bring it right back.

- Plus various smaller improvements to layout and usability.

### 1.2 — 2017-01-16

This app has been updated by Apple to display the Apple Watch app icon.

fixed some bugs.

### 1.1 — 2017-01-10

- fixed some bugs.

## Apps similar to Calculator HD

| App | Rating | Price | Category |
| --- | --- | --- | --- |
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| [Calculator Pro+ for iPad](https://appshunter.io/ios/app/calculator-pro-plus-for-ipad/id749118884) | 4.4 (61,593) | Free | Utilities |
| [Calculator for iPad₊](https://appshunter.io/ios/app/calculator-for-ipad/id1174240047) | 4.5 (126,024) | Free | Utilities |
| [Calculator₊](https://appshunter.io/ios/app/calculator/id398129933) | 4.7 (1,729,318) | Free | Utilities |
| [Calculator‰](https://appshunter.io/ios/app/calculator/id486645049) | 4.9 (409,057) | Free | Utilities |
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## More apps by Studio Zebra

- [Ringtone Studio - Music Cutter](https://appshunter.io/ios/app/ringtone-studio-music-cutter/id605125565)
- [Voice Recorder HD - Transcribe](https://appshunter.io/ios/app/voice-recorder-hd-transcribe/id779128258)

All apps by Studio Zebra: https://appshunter.io/developer/388549605

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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 2026-09-10.*