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9 Best Calculator Apps

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.

Digits app is one of the most popular calculator apps for iPhone and iPad that automatically updates like spreadsheet apps and has the features you want from a full-featured and easy to use user interface. Digits have a very clean, beautiful user interface and printing/sharing features that make it a very useful calculator app in daily life.

Digits is an ideal calculator replacement for day-to-day math. One of its most powerful features is the tape, which keeps a running tally of calculations. This is especially helpful for those doing bookkeeping or any kind of itemization where you want to go back and see the entire strand of numbers. You can change the background color and font size to add a little bit of customization. It is an extremely flexible scientific calculator armed with powerful features.

Devices: iPhone, iPad

Download Digits, the calculator for humans now


Financial calculator is one of the most complete financial calculators which can both save and make you money making it one of the best calculator apps. Financial calculator is a great option for both students and business owners. It’s very useful in handling accounting, investments, mortgage and finance applications and other formulas useful for business or finance.

Financial calculator app includes a series of other calculators within it: TVM Calculator, Currency Converter, Loan Calculator, Compound Interest Calculator, Credit Card Pay Off Calculator and more calculators. Only Currency Converter needs internet access. It helps you to calculate your desired contribution to your 401k account, auto loan, interest rates and start putting money away as early as today. 

Devices: Android

Download Financial Calculators now



If you're looking for a professional quality calculator app for your iPhone, you should use Calc Pro. Calc Pro is one of the best calculator apps available on the App Store that has 10 calculators in one. There is a basic calculator for your every day needs, a scientific calculator with RPN mode, a graphic calculator with eight available equations, a financial calculator including ten worksheets, and many great features such as standard, scientific, financial calculator and graphic calculator, base conversions, unit and currencies converter, date & time calculator, tip calculator, health and more.

Devices: iPhone, iPad

Download Calculator for iPhone - Calc Pro Free now



MyScript Calculator

( Android, iPhone, iPad )

MyScript Calculator (iOS) - is one of our favourite calculator apps for iPhone and iPad that allows you to write whatever math equations you need to on your iDevice's screen. After doing so, MyScript will digitally convert your handwritten equation into text, while at the same time giving you the solution to the math problem. The feel is completely natural as if writing on paper, and answers are presented in real-time. There is a redo/undo function, and the app itself works incredibly fast. 

MyScript Calculator app can perform basic mathematical functions including powers, roots, exponentials to advanced functions like trigonometry, logarithms and more. This calculator app is also great for quick calculations on-the-go, like when you’re at the grocery store.

Devices: Android, iPhone, iPad

Download MyScript Calculator now


Desmos Graphing Calculator

( Android, iPhone, iPad )

Desmos Graphing Calculator is one of the most popular graphing calculator app available in the app stores and one of the best overall calculator apps. The Desmos Graphing Calculator automatically solves and graphs equations for users. The calculator can plot a variety of different equations, from lines to parabolas and more. It can take a set of data and create a graph.

It supports functions and inequalities. This calculator app can also graph exponents and logs, trignometry functions, precalculus and calculus problems, and even statistics and probability. The uses of Desmos are unlimited in the math class. Desmos iOS, Android, and Google apps allow users to access the calculator without using Wi-Fi or data are available at no cost.

Devices: iPhone, iPad and Android

Download Desmos Graphing Calculator now


RealCalc is a real, functional scientific calculator app for Android mobile devices. When you first use this calculator app, you'll notice that it looks just like the standalone scientific calculator. Features include traditional algebraic or RPN operation, unit conversions, percentages, various display modes, and more.

A calculator help section gives written instructions on how to use each of the ten modes, and the calculator holds a results history in its memory. The button layout and functions feel familiar, and the act of punching out calculations just seems natural making it one of our favourite calculator apps. 

Devices: Android

Download RealCalc Scientific Calculator now


The Calculator

( iPhone, iPad )

The Calculator app is our answer to the need for a great and reliable calculator app. With millions of downloads and great reviews, it is the number one free utility app and most feature-rich calculator app for iPhone, iPad and Apple Watch and Android devices, and has been downloaded by millions of users around the globe.

You can download the calculator app now, and join the scores of users impressed by the calculator’s ease of use and extensive functionality options. Built-in currency converter feature is very useful to check the currency in another country. This is a very convenient feature if you have an international job, or if you like to travel.

The free calculator app offers two beautiful designs by default. You can personalize your calculator with additional themes (50+) which are available with an In-App Purchase or by unlocking themes one by one which is why it is one of our favourite calculator apps.

Devices: iPhone, iPad

Download The Calculator now


Mathlab Graphing Calculator app is an essential tool for school and college. Scientific, graphing, fraction and matrix calculator in one app!

This calculator app will be so beneficial by showing math problems worked out with intermediate steps which will help you understand the concepts. It’s a very powerful tool that can even solve matrices, equations systems, and graph. The graphs displayed are beautiful and it generates them automatically with x and y values.

Devices: Android

Download Graphing Calculator by Mathlab now


Calculator +

( iPhone, iPad )

Calculator+ is one of the better full-featured calculators, offering several different modes and calculator styles, supporting scientific, handwriting, polynomial, linear, graphing, and currency. 

This calculator app may help younger students who are just getting started with build some confidence with numbers. Another bonus of unlocking the full version is the customization, which lets you choose from several different themes to change up the look of the calculator.

Devices: iPhone, iPad

Download Calculator+  now


Google Calculator

( Android )

The Google Calculator is a pretty simple calculator, but it's nicely designed and easy to use. You can add, subtract, multiply, and divide (of course), but there are also basic trigonometric, logarithmic, and exponential functions. It even has an Android Wear version.

Unless you’re a student, a mathematician, or an accountant, you probably don’t need a super complicated calculator app. A lot of people only need a simple calculator and this android calculator app is perfectly capable of doing the job.

Devices: Android

Download Google Calculator  now


The right calculator is going to vary based on your needs. While all of the apps on this list are excellent choices, some are going to be geared for calculus, graphing, or other specific tasks while some may just want a calculator for paying the bills or finding how much to tip.

There are free calculator apps available with limited features. So before you pull the trigger it's worth reading the App Store description to get the full picture and find out if that is what you want.