---
title: "HappyKey - Reviews, Revenue and Downloads in United States | Apple App Store"
description: "HappyKey provides you with a simple keyboard with many useful math symbols. It will fulfill all of your math notation needs with numbers, superscripts, pi, math operators and relations, infinity, and "
---

# HappyKey — United States
> Math notation made easy!

![HappyKey App Icon](https://is1-ssl.mzstatic.com/image/thumb/Purple221/v4/fc/28/a7/fc28a7df-1dc2-b3ca-5427-1817a3b7dfcd/AppIcon-0-0-1x_U007epad-0-0-0-1-0-sRGB-85-220.png/434x0w.png)

**Developer:** [Alex Baratti](https://apptail.io/developer/alex-baratti-WRAf)
**Category:** Education
**Rating:** 3.7/5 (9 ratings)
**Price:** Free
**Bundle ID:** com.blogspot.mathjoy.MathSymbols
**Store:** Apple App Store
**Country:** United States
**Version:** 5.1 (released 2026-04-19)
**Original Release:** 2015-03-01
**Languages:** English

**App Store Link:** [Download on Apple App Store](https://apps.apple.com/us/app/app/id965705471)
**AppTail Page:** [https://apptail.io/app/happykey-XCHe/united-states](https://apptail.io/app/happykey-XCHe/united-states)

## HappyKey Description
HappyKey provides you with a simple keyboard with many useful math symbols. It will fulfill all of your math notation needs with numbers, superscripts, pi, math operators and relations, infinity, and beyond.

Install the app first, then to setup the keyboard go to Settings > General > Keyboard > Keyboards > Add New Keyboard > HappyKey

Note: This is not a calculator. This is an additional keyboard that makes it easier to type math notation.

Credit for the keyboard functionality and design goes to the open source Tasty Imitation Keyboard by Alexei Baboulevitch (GitHub user archagon).

## HappyKey Screenshots
- [Screenshot 1](https://is1-ssl.mzstatic.com/image/thumb/Purple221/v4/1e/79/ae/1e79ae18-9450-1800-8e3e-c00d530e4d1b/mzl.jqfwhlqq.png/1536x2048.png)
- [Screenshot 2](https://is1-ssl.mzstatic.com/image/thumb/Purple221/v4/9d/75/a4/9d75a496-1e73-f845-e03b-b4b888e37965/mzl.aqwvdtyw.png/1536x2048.png)

## HappyKey Rating Breakdown in United States
- 5 stars: 4 (44%)
- 4 stars: 2 (22%)
- 3 stars: 1 (11%)
- 2 stars: 0 (0%)
- 1 stars: 2 (22%)

## HappyKey Reviews in United States

### ****- "Where is it"
I can’t find it the letters THE LETTERS but love the app though!
-- Msn202222, 2025-12-29

### ***** "Free and Great"
I was scouting the internet for hours looking for a free keyboard that uses math notation and couldn’t find any that weren’t a few dollars, a subscription service or upwards of $24!!! This app is free and works perfectly! I wish there were differentials and integral symbols but I digress this is an amazing keyboard that adds super- and subscript functionality FOR FREE! Along with a few nifty math terms! I love it!
-- Evan42052, 2024-04-11

### *---- "Can’t seem to do anything"
When I launch the app, all I see is the teal blue screen with the smiley face on it. It won’t do anything. Otherwise, the app looks very helpful.
-- checkmate3141, 2019-06-19

### ***-- "The tiny numbers are where?"
On the App Store, the second screen shows much smaller numbers that I assumed would be superscript or subscript numbers. But on my phone it’s all large numbers, with the clunky way of using the ^ symbol to make a superscript that still is just a large size number.
-- Mnator, 2019-05-30

### ****- "Where is it"
Either I can’t find it or it isn’t there but I wish there was a division symbol
-- Baja blast king, 2018-03-12

### ***-- "Has potential"
This app has potential to be a great resource for students in school to support math recording.  However, the multiplication symbol need to be a "X" rather than a dot.  With this simple adjustment, it could be a very valuable tool for students to record math on the iPad.
-- AT Support, 2016-12-10

### **--- "No times symbol"
This app doesn't have the X like multiplication symbol. I needed that.
-- Warbleroni, 2016-07-09

### **--- "No multiplication symbol"
I got this keyboard because I really needed a multiplication symbol, but it is not included. Otherwise, it looks nice. Unfortunately, it does not do what I need.
-- googoo252, 2016-03-23

### ***** "Awesome!"
Great work! Maybe I can give some input on new keys to add to the keyboard. :)
-- KingZeldaMaster, 2016-02-04

### ***** "This App makes my life so much better"
This app I just amazing. Every math symbol is here so I can now do all my homework on my phone. This app is the best math app there is and it makes people's life way better.
-- Gusbus41, 2015-03-23

[View all HappyKey reviews and detailed analytics on AppTail](https://app.apptail.io/signup?utm_campaign=ai-crawl&utm_content=reviews)




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## HappyKey Available In
- [United States](https://apptail.io/app/happykey-XCHe/united-states)
- [India](https://apptail.io/app/happykey-XCHe/india)
- [Australia](https://apptail.io/app/happykey-XCHe/australia)
- [Hong Kong SAR China](https://apptail.io/app/happykey-XCHe/hong-kong)
- [Bahrain](https://apptail.io/app/happykey-XCHe/bahrain)
- [Brunei](https://apptail.io/app/happykey-XCHe/brunei)
- [Brazil](https://apptail.io/app/happykey-XCHe/brazil)
- [Belarus](https://apptail.io/app/happykey-XCHe/belarus)
- [Canada](https://apptail.io/app/happykey-XCHe/canada)
- [Switzerland](https://apptail.io/app/happykey-XCHe/switzerland)
- [Chile](https://apptail.io/app/happykey-XCHe/chile)
- [China](https://apptail.io/app/happykey-XCHe/china)
- [Dominican Republic](https://apptail.io/app/happykey-XCHe/dominican-republic)
- [Algeria](https://apptail.io/app/happykey-XCHe/algeria)
- [Ecuador](https://apptail.io/app/happykey-XCHe/ecuador)
- [Egypt](https://apptail.io/app/happykey-XCHe/egypt)
- [United Kingdom](https://apptail.io/app/happykey-XCHe/united-kingdom)
- [Indonesia](https://apptail.io/app/happykey-XCHe/indonesia)
- [Israel](https://apptail.io/app/happykey-XCHe/israel)
- [Japan](https://apptail.io/app/happykey-XCHe/japan)
- [South Korea](https://apptail.io/app/happykey-XCHe/south-korea)
- [Kuwait](https://apptail.io/app/happykey-XCHe/kuwait)
- [Kazakhstan](https://apptail.io/app/happykey-XCHe/kazakhstan)
- [Lebanon](https://apptail.io/app/happykey-XCHe/lebanon)
- [Sri Lanka](https://apptail.io/app/happykey-XCHe/sri-lanka)
- [North Macedonia](https://apptail.io/app/happykey-XCHe/north-macedonia)
- [Mexico](https://apptail.io/app/happykey-XCHe/mexico)
- [Malaysia](https://apptail.io/app/happykey-XCHe/malaysia)
- [Nigeria](https://apptail.io/app/happykey-XCHe/nigeria)
- [Norway](https://apptail.io/app/happykey-XCHe/norway)
- [New Zealand](https://apptail.io/app/happykey-XCHe/new-zealand)
- [Peru](https://apptail.io/app/happykey-XCHe/peru)
- [Philippines](https://apptail.io/app/happykey-XCHe/philippines)
- [Pakistan](https://apptail.io/app/happykey-XCHe/pakistan)
- [Russia](https://apptail.io/app/happykey-XCHe/russia)
- [Saudi Arabia](https://apptail.io/app/happykey-XCHe/saudi-arabia)
- [Singapore](https://apptail.io/app/happykey-XCHe/singapore)
- [Thailand](https://apptail.io/app/happykey-XCHe/thailand)
- [Türkiye](https://apptail.io/app/happykey-XCHe/turkey)
- [Taiwan](https://apptail.io/app/happykey-XCHe/taiwan)
- [Ukraine](https://apptail.io/app/happykey-XCHe/ukraine)
- [Uzbekistan](https://apptail.io/app/happykey-XCHe/uzbekistan)
- [Vietnam](https://apptail.io/app/happykey-XCHe/vietnam)
- [United Arab Emirates](https://apptail.io/app/happykey-XCHe/united-arab-emirates)
- [South Africa](https://apptail.io/app/happykey-XCHe/south-africa)
- [Armenia](https://apptail.io/app/happykey-XCHe/armenia)
- [Argentina](https://apptail.io/app/happykey-XCHe/argentina)
- [Azerbaijan](https://apptail.io/app/happykey-XCHe/azerbaijan)

---

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