Calculate without switching apps.
A calculator built right into your keyboard — works everywhere.
Split bills, calculate tips, and insert results instantly.
Tired of switching apps back and forth?
Calkey is a calculator built right into your keyboard. Whether you're in Messages, Notes, Safari, or any other app, you can calculate on the spot—without ever leaving your keyboard. Results insert with a single tap.
■ Perfect for:
• Splitting the bill
Calculate "125 ÷ 4" right in your group chat and send it instantly.
• Shopping abroad
Convert currency and paste the result straight into your notes.
• Quick calculations
No more hunting for the calculator app and switching away from what you're doing.
■ Key Features
• Built into your keyboard
Access it anytime, anywhere.
• One-tap input
Tap any result to insert it as text.
• Formula input
Insert the full equation too. Show your work with formats like "1000 + 500 = 1500."
• Customizable
Light/Dark mode support and adjustable keyboard height.
• Works offline
Your calculations stay private—nothing is sent externally.
Make your iPhone keyboard smarter.
Download Calkey now and experience effortless calculations.
Ratings & Reviews
This app hasn’t received enough ratings or reviews to display an overview.
v1.3.3 Update
■Improvements
・The keyboard now adapts more reliably to Dark Mode and screen-size changes.
・Review requests are now timed more appropriately based on your usage.
■Fixes
・Fixed how the app reports Pro purchase transactions that cannot be verified.
Version 1.3.3
The developer, Ryunosuke Karimata, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Privacy practices may vary, for example, based on the features you use or your age. Learn More
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
