King Calculator

Calculator Inc

In-app purchases

About this app

Free, easy to use, intuitive and functional, using fractions is easy!

Our flexible display allows easy input of numbers, functions, operators and percentage calculations.

Using fractions is easy, you can change the cursor position and edit the input with no effort.
Color highlighting will make the math expression readable/editable.
If you want to double the display size, you can do it in a click, at any point.
Supporting all screen sizes, the app is compatible with any phone or tablet.

Switch between the scientific calculator layout and the simple layout by rotating your device.
The calculator draw graphs, support big numbers and use memory variables. All of those can be an integral part the expression you input.

View calculations and results in the history screen, input them again, or store a result into memory.

Choose between memory operations with MRC, M+, M- buttons, or usw memory variables instead.

Including Material Design layouts, and five different themes.
This is a free calculator, it will remain free, no additional purchases required to unlock features.
The app doesn't require any intrusive permissions.

Are you taking calculus or algebra courses in school or college? You need this app.


Main features:
★ Fractions. Input, edit, convert.
★ Basic and advanced arithmetic.
★ Operation priority.
★ Percentage calculations.
★ Memory variables.
★ Big numbers support.
★ Ans button, that saves the last result for the following expression.
★ Calculations history.
★ Equations editor.
★ Memory/percentage operations (M+ / M- / MRC buttons).
★ Trigonometry functions ( Sine, cosine, tangent, arcsine, arcosine, arctan, hyperbolic sine, hyperbolic cosine, hyperbolic tangent).
★ Exponents, you can raise a number to any power.
★ Squared root and cubed root.
★ Factorial and modulo operations.
★ Logarithmic functions.
★ Absolute value function.
★ Ceil and floor.
★ Basic calculator layout.
★ Scientific calculator layout.
★ Graphing functions (Single variable functions).
★ Material design interface.
★ Free.

Ratings and reviews

Very easy to use, and it includes many functions. Issues I had earlier, Plot not working properly if function starts with a negative value and inability to read the Settings page and error messages, have been fixed. I am also an iPad user, and I wish you had a King Calculator for iPad, too.

[Fixed] Great calculator, however I don't know how but from a few days ago it started to have some visual bugs, mainly the settings page having white text on its white background which makes them invisible. and another is the answer preview number which has the same white text issue on bright background. tried on my friends phone and same visual bug. update²: the 2.3.5 seem to have fixed it, thank you for the great support.

Hi, I've been using this app for many years. On the last update, the equals sign is half covered by the Android buttons at the bottom, making it very difficult to press. Is this something you plan to fix? I really like this app and would hate to have to switch. I'm using Android 16 on an S22 Ultra. Thanks! Hi again, I meant to add that I use the premium version. :) Thank you for your plans to fix it!

What’s new

Totally Free!
Easy to use
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Try it 😀