There are dozens of calculator apps in the App Store and Play Store that may overwhelm you. Whether you are a student, business owner, engineer, scientist or just an average person working on your taxes, a calculator app is an essential tool to have on your iPhone, iPad, Apple Watch and Android devices. A good calculator app makes life easier and helps prevent errors. 

A handy calculator app will help you to do everyday calculations whether it’s shopping, or homework or balancing chequebooks or calculating taxes. If you want to solve simple or complex calculations, advanced features like graphing or unit/currency conversion or scientific functions like algebra, integrals will be useful in the multi-purpose calculators. We’ll focus more on some of the scientific and graphing calculators you can find for smartphones and tablets.

Here is the list of the best calculator apps on Android and iOS that will help you through calculations as well as using it in daily use.