# iCalculator - Keyboard Calc — Basic & Scientific Calculator

> Instant calculation keyboard and scientific calculator with themes and history. (iPhone/iPad app by Nan Chao.)

- Source: https://appshunter.io/ios/app/icalculator-keyboard-calc/id1176527512 (this page in markdown: same URL + `.md`)
- Developer: [Nan Chao](https://appshunter.io/developer/965680403)
- Category: Utilities, Productivity
- Price: $1.99 with in-app purchases
- Rating: 5.00/5 from 3 App Store ratings · 42 written reviews indexed
- Age rating: 4+
- Requires: iOS 13.0 · 6 MB
- Languages: American English, Arabic, Catalan, Croatian, Czech, Danish, Dutch, Finnish, French (France), German (Germany) and 22 more
- Released: 2017-05-04
- Data updated: 2026-08-22
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/icalculator-keyboard-calc/id1176527512/reviews.md

## What is iCalculator?

Award-winning calculator app for iPad and iPhone with no ads. Designed with simplicity, usability, and beauty in mind!
Join millions of users by downloading iCalculator on your iPhone, or iPad.

[QUICK START]
* There is no "=" button in this calculator app. It will calculate and show the result as soon as the expression is updated. If you need the next calculation, please click "CE" button; if you want to edit the calculation, please click "Del" button.
* Swipe up/down to hide/show the history records.
* Swipe left and right to hide/show the scientific/math functions.

[How to add a keyboard calculator]
1. Go to Settings > General > Keyboard.
2. Tap Keyboards, then do any of the following: Add a keyboard: Tap Add New Keyboard, then choose "iCalculator" from the list.
3. When the screen changes, touch "iCalculator" and "Allow full access".

[How to add the Today Widget]
1. In Today View, scroll to the bottom. You should find an Edit button. Tap it.
2. A new Add Widgets screen appears with a list of widgets. There are two lists here. The first lists the active widgets in your Today View. Scroll down until you see the More Widgets section, which is the widgets not in your Today View.
3. Find the widget "iCalculator". Tap the “+” icon. The widget will move to the bottom of the list of active widgets above the More Widgets section.

[FEATURES]
• No push, no news, no ads, 6.5MB, booting under one second.
* Basic & Scientific Calculator
* Fraction & Expression Calculator
* Calculate and show results instantly when the input is updated.
* History List: all Calculations are Saved and can be Copied and Forwarded; hide and open with one simple click
* Quick Equation Preview: Your current Equation is displayed below the result
* Basic Calculation Buttons in Portrait view
* Advanced Mathematical/Scientific Buttons in Landscape view
* Equations are automatically saved to the History list, which syncs with iCloud.
* Use the fraction key to do coherent fractional math. Calculate fractions: add, subtract, divide and multiply.
* Full support for iPad Split Screen multi-tasking.
* Install the iCaculator keyboard so you can calculate a question in any app. Tap the "Insert" button, and the answer is inserted in the text field.
* Made a mistake? Tap the current equation to enter edit mode, where you can select characters, insert and delete.
* Apply 16 beautiful themes, including new entrants Candy, Mint, Lava, and a “bright themes” set.
* Use the Theme Creator to make your own bright and beautiful color scheme.

Purchase service:
##Services support the developer by keep working on it and adding new features. If you do not subscribe to the service, it does not affect any features.
##The service is valid for one month and will be automatically renewed upon expiration
##Account will be charged for renewal within 24-hours before the end of the current period, and identify the cost of the renewal
##Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's Account Settings after purchase

Privacy Policy and Terms：
http://www.ledego.com/apps/icalculator/privacy.html

## Key features

- Instant calculation without '=' button
- Basic & Scientific Calculator
- Fraction & Expression Calculator
- History List with iCloud sync
- Customizable themes
- Keyboard extension for any app
- Today Widget support

## Pricing and in-app purchases

Base price: $1.99.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Monthly Subscription | $0.49 | per month |


## Recent user reviews (10 of 42)

All indexed reviews: https://appshunter.io/ios/app/icalculator-keyboard-calc/id1176527512/reviews.md

### 5/5 — 使いやすい

*2026-07-24*

シンプルで使いやすい

### 4/5 — 说一下我觉得的不足之处

*2026-04-15*

整体来说肯定是非常好的。但是有一点，经常如果数字按得快且触控比较轻的话，总是会漏掉按下去的数字😮‍💨这一点我不知道是软件的问题还是iPhone的问题

### 5/5 — 计算器

*2025-12-07*

好用

### 5/5 — これ以上のアプリはありませんね

*2025-08-25*

横画面やばい

### 5/5 — 広告なし

*2025-06-09*

履歴が残って使いやすい！

### 5/5 — 使いやすい

*2025-04-13*

シンプルで多機能

### 4/5 — Messageで割り勘計算に使用

*2024-11-29*

ちょっと特殊な電卓だが、余分なスペースを使わず便利。個人的には、開いた時に前の計算が残っているのはクリアしないといけないので面倒。オプションで切り替えられるとありがたい。
あと、iOSアプデしたらウィジェットで使えなくなった。

### 2/5 — 使いにくい

*2024-11-19*

Padの置き方でよってタッチミスが出やすい。
履歴で確認できるのはいいのですが、長くなれば確認も面倒

### 5/5 — 楽

*2024-11-04*

いちいちイコールを押さなくても答えが表示されるので楽です。

### 3/5 — イコールが欲しい

*2024-06-01*

＝表示のオンオフが出来ると良いと思います、新規開始を毎回押すのは不便です。
＝を押さなくても回答が表示されるのはすごく良いですが＝ボタンが無いのが不満です。

## Frequently asked questions about iCalculator

### What does iCalculator do?

iCalculator is a calculator app for iPhone and iPad that provides both basic and scientific calculation functions. It calculates results instantly as you input expressions, offers a history of calculations, and can be used as a keyboard extension within any app.

### How do I use the keyboard calculator feature?

To use the keyboard calculator, go to your device's Settings > General > Keyboard. Tap 'Keyboards', then 'Add New Keyboard' and select 'iCalculator'. You may need to grant 'Allow full access' for it to function correctly.

### Is iCalculator free to use?

The app itself is free to download and use, offering core calculator features without ads. There is an optional subscription service that supports the developer and helps in adding new features. This subscription is not required to use the app's existing functionalities.

### What devices is iCalculator compatible with?

iCalculator is designed for iPad and iPhone. It supports features like iPad Split Screen multitasking and can be added as a keyboard extension or a Today Widget on compatible iOS devices.

### How does the instant calculation work?

Instead of an '=' button, this app calculates and displays the result as soon as the expression is updated. If you need to clear the current calculation, use the 'CE' button. To edit a previous entry, tap the current equation to enter edit mode.

## Version history (last 5 releases)

### 8.1 — 2024-02-11

Improve Performance

### 8.0 — 2024-02-07

Improve Performance

### 7.2 — 2024-01-28

Improve Performance

### 7.1 — 2022-08-28

Improve performance

### 7.0 — 2022-04-16

Improve Performance

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All apps by Nan Chao: https://appshunter.io/developer/965680403

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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 2026-08-22.*