Calku is a free iPhone app developed by Supagarn Pattananuchart in the Utilities & Tools category. This innovative app turns your keyboard into a calculator, simplifying calculations on the go. Whether you're sending messages, doing homework, or taking notes, Calku allows you to perform calculations without the need to switch apps or copy and paste.

One of the standout features of Calku is its compatibility with a wide range of applications. You can use it seamlessly with popular messaging apps like Messages, Messenger, WeChat, and Line, as well as social media platforms such as Twitter, Telegram, and Instagram. Additionally, Calku is compatible with Safari, Notes, Mail, Stocks, and many more applications.

Calku offers a range of useful features, including support for dark mode and iPad OS. You can configure the decimal point to suit your preferences and take advantage of the scientific calculator for more complex calculations. The app also provides a calculation history and a text clipboard for easy access to previous calculations and copying results. Additionally, Calku includes keyboard sound for a satisfying typing experience.

With its versatile functionality and seamless integration with various applications, Calku is a convenient tool for quick calculations on your iPhone.