# kChem - Chemistry Keyboard — chemical formula and equation

> iOS keyboard extension for typing chemical formulas and equations. (iPhone/iPad app by 煦 张.)

- Source: https://appshunter.io/ios/app/kchem-chemistry-keyboard/id1180018433 (this page in markdown: same URL + `.md`)
- Developer: [煦 张](https://appshunter.io/developer/494537607)
- Category: Utilities, Productivity
- Price: $1.99
- Age rating: 4+
- Requires: iOS 12.0 · 5 MB
- Languages: American English, Chinese (Simplified, China)
- Released: 2016-12-16
- Data updated: 2026-08-29
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/kchem-chemistry-keyboard/id1180018433/reviews.md

## What is kChem?

The kChem is a Keyboard Extension, designed for the user who needs to enter chemical formula in word, PPT, notes and other text apps on iPhone or iPad.

For example :

8NH₃ + 3Cl₂ = 6NH₄Cl + N₂
3CO + Fe₂O₃ = 2Fe+3CO₂

Superscripts: ⁰ ¹ ² ³ ⁴ ⁵ ⁶ ⁷ ⁸ ⁹ ⁺ ⁻
Subscripts: ₁ ₂ ₃ ₄ ₅ ₆ ₇ ₈ ₉ ₀ ₊ ₋

This keyboard does not require network access.

Tips:

If you could not find kChem when tap globe key : Remove kChem in the system settings, re-add it.

----------

Easter Egg  

This is not a keyboard , it's a tool which could help you to create a chemical equation image.

## Key features

- Chemical formula input
- Equation creation
- Superscript characters
- Subscript characters
- Offline functionality
- Keyboard extension

## Recent user reviews (10 of 24)

All indexed reviews: https://appshunter.io/ios/app/kchem-chemistry-keyboard/id1180018433/reviews.md

### 4/5 — “加个箭头”

*2024-03-08*

能不能加一个有机方程式的箭头？我下这个软件的初衷就是些有机的方程式。

**Developer response:** 如果您说的是生成化学方程式图片的那个功能，在编辑页面长按等号按钮就会出现箭头和可逆符号的选项。

### 4/5 — 请求解决

*2023-08-17*

数字上标123的字体和456的字体不一样，可以解决吗

**Developer response:** H¹²³⁴⁵⁶ 这个字体取决于您的文本编辑器的环境。如果您所用的是word，可以选中文字选择相应的支持上下标的字体。

### 3/5 — 一个建议

*2022-09-25*

化学符号未更新！请及时更新

### 5/5 — 该更新啦

*2021-10-08*

第七周期的后面几个uu物质已经有正式的字母名了，更新一下吧😄

### 2/5 — 不方便

*2021-09-15*

1:无法输入高分子化合物，下标n无法输入 2:无法输入芳香性有机化合物 3:无法输入键线式化学式 4:无法输入芳香性化合物 5:下标不够用，略显鸡肋。能有的功能基本其他手段也能实现。建议改一下，叫无机化学专用键盘。并且在ipad上无法适配妙控键盘，远没达到我的预计效果，希望可以退款。谢谢

### 4/5 — 增加

*2021-07-01*

下角标上角标1-5不够用，尤其是下角标。建议增加。

**Developer response:** 在键盘上点击Abc按钮，然后长按一个数字按键，就会出现相应的上下角标。0-9都有。:-)

### 5/5 — 反应条件怎么输入啊

*2021-01-11*

反应条件怎么输入呢？

### 5/5 — 建议加竖号之类的可以写电池，但是已经很好了，继续加油，棒棒哒

*2020-10-24*

建议加竖号之类的可以写电池，但是已经很好了，继续加油，棒棒哒

### 5/5 — 太酷了这个键盘。帮我省去了输入法的很多烦恼。

*2020-09-17*

建议后期可以增加自动识别书写体。

### 5/5 — 建议再多加几个符号

*2020-06-06*

比如三键，还有向上的单双键那种

## Frequently asked questions about kChem

### How do I enable kChem on my iPhone or iPad?

To enable kChem, go to your device's Settings, then tap 'General', followed by 'Keyboard', and finally 'Keyboards'. Tap 'Add New Keyboard...' and select kChem. If you still can't find it, try removing and re-adding it from the system settings.

### Does kChem require an internet connection?

No, kChem does not require network access to function. You can use it to input chemical formulas and equations offline, making it convenient for use anywhere.

### What is the price of kChem?

kChem is a paid application, available for a one-time purchase of $1.99. This price grants you access to all its features without any additional in-app purchases or subscriptions.

### What devices is kChem compatible with?

kChem is designed for Apple devices and is compatible with iPhone, iPad, and iPod touch. It functions as a keyboard extension within these devices.

### How often is kChem updated?

The latest version of kChem is 1.5, last updated on November 26, 2019. While updates may not be frequent, the app is stable and functional for its intended purpose.

### What is the age rating for kChem?

kChem has an age rating of 4+. This indicates it is suitable for users of all ages, with no content restrictions.

### Can kChem create images of chemical equations?

Yes, in addition to being a keyboard extension, kChem can also function as a tool to help you create images of chemical equations.

### Does kChem have ads?

No, kChem does not contain advertisements. As a paid application, it offers an ad-free experience for users.

## Version history (last 5 releases)

### 1.5 — 2019-11-26

- Support dark mode
- Add a Easter Egg  (not a keyboard). The tool could help you to create a chemical equation image.

### 1.4 — 2019-05-27

- Optimized for iPad Pro 12.9-inch

### 1.3 — 2019-04-18

- Fix bugs in iPhone X landscape mode

### 1.2 — 2018-12-09

- New Keyboard Layout, easier to use

### 1.1 — 2018-10-22

- Support iOS 12

## Apps similar to kChem

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Linecom Wear File Manager](https://appshunter.io/ios/app/linecom-wear-file-manager/id6526461522) | — | $0.99 | Utilities |
| [多多背诵](https://appshunter.io/ios/app/id1672742509) | — | Free | Utilities |
| [Math Keyboard For Equations](https://appshunter.io/ios/app/math-keyboard-for-equations/id6743451464) | 4.6 (8) | $0.99 | Utilities |
| [Molecule Simulator](https://appshunter.io/ios/app/molecule-simulator/id1538249996) | 4.3 (24) | Free | Utilities |
| [K4us English Keyboard](https://appshunter.io/ios/app/k4us-english-keyboard/id978718484) | 3.0 (2) | $0.99 | Utilities |
| [Pakomatic Kurier](https://appshunter.io/ios/app/pakomatic-kurier/id6745411253) | — | Free | Utilities |

## More apps by 煦 张

- [Text to Image](https://appshunter.io/ios/app/text-to-image/id540766202)
- [Bamboo Calculator](https://appshunter.io/ios/app/bamboo-calculator/id654137626)
- [BCalc - a daily calculator](https://appshunter.io/ios/app/bcalc-a-daily-calculator/id667240643)
- [xKeyboard - Custom Keyboard](https://appshunter.io/ios/app/xkeyboard-custom-keyboard/id1440245962)
- [kIPA English - Keyboard](https://appshunter.io/ios/app/kipa-english-keyboard/id1445641709)

All apps by 煦 张: https://appshunter.io/developer/494537607

## Related topics

[palette for chemical formula](https://appshunter.io/ios/topics/palette-for-chemical-formula) · [chemistry keyboard](https://appshunter.io/ios/topics/chemistry-keyboard)

---

*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 2026-08-29.*