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Quick summary
Calku — Calculator Keyboard is a free iPhone utility created by Supagarn Pattananuchart. It converts your iPhone keyboard into a calculator, letting you do math directly where you type so you don’t have to switch apps or copy and paste results.
Works inside these apps
- Safari, Notes, Mail, and Stocks
- Telegram, Messages, Messenger
- Instagram and Twitter
- WeChat and Line
- Many other apps that accept a keyboard input
Core capabilities
- Built-in scientific calculator for advanced operations
- Option to set the decimal separator to your preference
- Calculation history and a clipboard for quick access to past results
- Dark mode and iPadOS compatibility
- Optional keyboard click sounds for tactile feedback
- Inline calculations so results appear without leaving the active app
Why it’s useful
Calku streamlines quick arithmetic during messaging, composing emails, browsing, or taking notes. Its broad app compatibility and handy extras (history, clipboard, and scientific functions) make it a convenient tool for anyone who needs fast, in-place calculations on an iPhone.
Technical
Title
Calculator Keyboard - Calku
Requirements
- iPhone
Language
No language has been specified.
Available languages
License
- Free
Latest update
2025-12-24
Author
Supagarn Pattananuchart
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