HappyCalc

HappyCalc is a compact, offline calculator designed for everyday use and basic scientific tasks. HappyCalc provides a clear numeric display, a history of recent calculations, and a simple settings panel to adjust number format and themes.

Key features

• Standard and scientific modes including trigonometric and logarithmic functions.
• Calculation history and editable entries for reviewing recent results in HappyCalc.
• Customizable appearance with light and dark themes and adjustable font size.
• Quick-access widget and copy/paste support for transferring results to other apps.

How it works

Use the keypad to enter expressions, switch modes for advanced functions, and tap history items to reuse previous calculations. The interface prioritizes readability and straightforward operation without requiring an account.

Privacy and performance

All calculations are performed locally on the device. HappyCalc does not collect personal data and minimizes permissions to preserve battery and storage.