HappyCalc

HappyCalc is a compact and reliable calculator designed for everyday use. HappyCalc provides basic arithmetic, scientific functions, and a clear expression editor in a lightweight interface suitable for phones and tablets.

Key Features

• Standard and scientific calculations: support for parentheses, trigonometric functions, powers and roots.
• Expression editor: enter and edit full expressions before evaluating.
• History and memory: view past results and store values for reuse.
• Customization: adjustable theme and button size for accessibility.
• Reliable offline use: calculations run locally without network access, keeping results private to the device.
• Optimized performance: HappyCalc is designed to be responsive on a wide range of devices.

How it works

Tap to enter numbers and operators, use the expression editor to adjust entries, and consult the history to recall previous results. Settings allow you to change theme and precision to match your workflow. HappyCalc focuses on providing a straightforward experience for common and advanced calculation needs.