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Simple Calculator

A simple all-in-one calculator and unit converter for Android
New in version 1.0.2
* Handle expressions that blow to infinity like tan(π/2)
* Update how to display error messages
* Make precision dialog more user-friendly
* Fix the bug with converter swap button
* Throw an error if temperature conversion results into a value below absolute zero
* Add other minor fixes that ensure accuracy in the converter
Simplify your daily calculations and unit conversions with this simple 2-in-1 math toolkit.






Key Features


  • Arbitrary Precision: Calculate with the precision that suits you. No floating-point error.


  • Scientific functions: Perform trigonometric, logarithms, exponents, and roots functions with ease. The interface is designed for speed, allowing you to edit calculations on the fly and view history instantly.


  • Real-Time Unit Conversion: Experience live conversion that updates results as you type. No need to press an "equals" button. With support for Metric and Imperial systems, you can effortlessly convert between units like kilometres to miles, Celsius to Fahrenheit, or kilograms to pounds.


  • Offline functionality: Everything is offline.


  • No Clutter, No Hassle: Unlike bloated alternatives, our app focuses on what matters only. No permission, no ad, just speed, accuracy and simplicity.


Technical Details

  • Compatibility: Optimized for Android 7 and above.

  • Privacy: Your data are not collected.


  • app screenshot
  • app screenshot
  • app screenshot

Versions

Although APK downloads are available below to give you the choice, you should be aware that by installing that way you will not receive update notifications and it's a less secure way to download. We recommend that you install the F-Droid client and use that.

Download F-Droid
  • Version 1.0.2 (2) suggested Added on Oct 25, 2026

    arm64-v8a armeabi-v7a x86 x86_64

    This version requires Android 7.0 or newer.

    It is built and signed by the original developer, and guaranteed to correspond to this source tarball.

    Permissions
    • hpl.apps.android.math.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION

    Download APK 2.1 MiB PGP Signature | Build Log

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