HappyKey

Name: HappyKey
Rating: 3.7 (9 reviews)
Author: Alex Baratti

By: Alex Baratti

Math notation made easy!

Features & Capabilities

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).

User Growth & Download Statistics

App

By:

Alex Baratti

Rating:

3.70

(9) 3.70

Version:

5.1 Last updated: 2026-04-19

Version code:

884677827

Creation date:

2015-03-01

Compatible devices:

Size:

4.65MB

URLs:

Full description:

Source:

Apple Apps Store

Data ingested on:

2026-06-30

Compare stats and ranking:

Ranking

# 449,358 ▲ 880,657

For Developers

Monetize with App Pass Boost with Extension Booster

Contact the developer

Chrome-Stats does not own this Apple app. Please use these information below to contact the Apple app developer.

Developed by:

Alex Baratti

Apple Apps Store

https://apps.apple.com/us/app/happykey/id965705471

User Reviews

I can’t find it the letters THE LETTERS but love the app though!

by Ms*****, 2025-12-29

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!