Only Calculator – Math

OZ Lab

About this app

Only Calculator is a clean and reliable calculator app designed for everyday math and advanced calculations. Its modern interface and thoughtful layout make it simple to perform quick calculations, revisit past results, and customize the experience to your needs.

📶 Works Fully Offline

Only Calculator runs without internet access and requires minimal permissions. This keeps your calculations private and available anytime.

🔢 Basic & Advanced Calculations

Handle a wide range of math tasks, including:
• Basic arithmetic
• Roots and powers
• Percentages
• Mortgage and interest calculations
• Long expressions and chained operations

Everything is designed to support everyday and extended use.

📳 Personalization & Control

Customize the app to match your preferences:
• Optional vibration feedback
• Keep-screen-on mode
• Adjustable interface settings
• Multiple layout and style options

Create a comfortable setup that fits the way you calculate.

🔒 Private by Design

Your data stays on your device.
Only Calculator does not collect, store or share personal information.

📊 Built-in History

Quickly review past calculations with an easy-to-access history log. Reuse previous results without typing them again.

🎨 Themes & Visual Styles

Choose from a variety of colors, text styles and background options. Build a clean and minimal interface that suits your workflow.

🟦 Open Source

Only Calculator is fully open-source, giving you full transparency and the ability to inspect or audit the code anytime.

Only Calculator provides a simple, customizable, and private way to handle everyday math on your Android device.

What’s new

Performance improvement.