# Calc4Key: Calculator Keyboard

> Calculator on keyboard

Canonical page: [https://chrome-stats.com/d/me.khangle.calc4key](https://chrome-stats.com/d/me.khangle.calc4key)

## Overview

- **ID:** `me.khangle.calc4key`
- **Platform:** Android
- **Type:** Android app
- **Status:** Available
- **Publisher:** KL Studio
- **Category:** TOOLS
- **Downloads:** 18,414
- **Rating:** 3.20 / 5 (125 ratings)
- **Version:** 1.3
- **Last updated:** 2024-07-15
- **First published:** 2021-09-17
- **Publisher country:** VN
- **Size:** 3.28 MB
- **Data as of:** 2026-09-16
- **Store listing:** [Google Play Store](https://play.google.com/store/apps/details?id=me.khangle.calc4key)
- **Website:** [https://khangle.me](https://khangle.me/)
- **Privacy policy:** [https://khangle.me/privacy.html](https://khangle.me/privacy.html)

## Description

Calc4Key is a handy Chrome extension that integrates a calculator directly into your keyboard, allowing you to perform calculations anytime without switching between apps or copying and pasting results. Once enabled in your system settings and selected as your keyboard, you simply launch Calc4Key, enable it with a tap, and start calculating on-the-go seamlessly. This extension enhances productivity by streamlining calculator access directly through your keyboard.

## Rankings

- #448,802 — Overall

## Review summary

Users praise Calc4Key as a handy, well-liked tool for quick numeric input and simple calculations while using other apps. Major recurring issues are inability to switch keyboards, confusing or failing setup/visibility, and performance/reliability problems compared with the phone's built-in calculator.

### Pros

- Convenient for quick, inline calculations while using other apps
- Good for simple numeric input and sending quick calculations
- Generally liked by multiple users (positive feedback/approval)

### Cons

- Users frequently cannot switch back to other keyboards or find a way to change keyboards
- Setup/visibility confusion — many report not seeing the Calc4Key keyboard icon or not knowing how to enable/use it
- Performance and reliability complaints; some say it's worse than the phone's native calculator

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Source: [Chrome-Stats](https://chrome-stats.com/d/me.khangle.calc4key)