# 20 Best Calculator apps for iPhone & Android

## Google Calculator

Exactly, where would we go without our favorite giant corporation! Well, speaking seriously, Google is one of the greatest software developers in history and it would be weird if it would have its calculator app for its gadgets. This is a simple, yet useful app.

All the basic calculation functions that you might need can be found here. For example, those could be addition, subtraction, multiplication, and division. The calculation for such complicated things as trigonometric, logarithmic, and exponential functions is available as well.

Thus, if it’s not installed on your Android device yet, you should probably get it right away. Unfortunately, this app is Android only.

By the way, on analyzing the whole market of calculator apps you can note a stable tendency that there is always an app either for iOS or Android. There are almost no cases when an app would be available for two platforms.

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## Calculator ++

**Available operations:**

• You can do calculations with variables and constants

• You can use built-in functions or add your own

• It is possible to integrate and differentiate

• You can do calculations with fractions and simplify expressions

• You can do calculations with complex numbers

## Calculator Plus Free

USA TODAY named Calculator Plus among its “25 Essential Apps”, calling it the “handy calculator app that’s garnered great user ratings”.

Calculator Plus Free is a perfect calculator app for both iPhone and Android devices. It is easy to use and beautifully designed. It is created to save your time and efforts.

**Distinctive features of Calculator Plus Free**

- It remembers everything you have ever calculated, you can review it anytime
- It is possible to use backspace anytime to correct a simple mistake, instead of starting over
- It shows your calculations in clear, elegant type that’s easy to read
- You can use memory to keep a running total you can see

Calculator Plus Free is a perfect finding for shopping, doing homework, balancing checkbooks, or even calculating taxes.

Let Calculator Plus finally put that handheld calculator to rest!

## CALCU™ Stylish Calculator Free

CALCU™ is one of the high rated calculator applications created for Android users. It is a stylish calculator with several themes for you to choose from.

**Why you should choose CALCU™**

- It has an intuitive interface with gesture-based control and navigation
- You can see instant results of your mathematic operations
- To open the history of your calculations just swipe down on the display or use show memory keys option
- You can choose between simple and full keypad layout

CALCU™ offers all the regular and scientific calculator functions in a simple, stylish and easy-to-use app. Download the perfect calculator for free today!

## Scientific Graphing Calculator

It doesn’t matter what your needs are since this calculator app can always compile a perfect graph for you. Moreover, don’t be afraid to put in more complicated formulas here, since the app will probably be able to handle them. It can make a graph up to nine equations at once.

Even if you have data with polar coordinates, it will still be able to build a graph. The same is possible for the parametric equations. Complex numbers, sig fix and many more – give it to this app to handle all those harsh mathematical stuff!

## HiEdu : He-570

In the last position of this list, you will find a similar calculator, but this version is a little bit more sophisticated. This is a truly scientific calculator that allows you not only to conduct manipulations with various standard numbers and formulas but also to use physics and chemistry formulas, which makes this app more versatile in usage.

Apparently, the input of more complex functions (log, x2, x3, x^), “, x?1, 10^, e^, d/dx, ?, Abs …) is included. When you see you made a mistake you can recall an action. Another super feature here is that you can save the history of all your calculations.

In total, the app includes more than 1000 mathematical formulas and only the real nerd won’t find here what he/she needs. That was a joke, of course. In total, you can make calculations with this app for such sciences as electric, mechanics, thermal physics, optics and many more.

## CalcTape Free Tape Calculator

CalcTape is an innovative substitute for a pocket calculator. It has all the functions that every calculator should have and some other specific features of its own. Using CalcTape you can share your results via email, Airdrop and more. Also, you can print your calculations.

CalcTape is used for money, tax, and any other percentage calculation easily. You can save your calculations into files and open them later to continue or to change. Calculations are refreshed automatically.

CalcTape is more than a calculator!

It is free with in-app purchases on Android devices and paid-for iPhone users.

## Free Graphing Calculator

Free Graphing Calculator is a helpful multi-optional tool for calculations. Simple to grasp and easy to use, but powerful features are available when you need them.

Available functions include the following:* **the usual arithmetic functions and exponentiation; square root, cube root, nth root, natural log, log base 10, the log of arbitrary base, absolute value, factorial, permutations (NPR), combinations (NCR), modulus, random integer, bell curve, cumulative normal distribution, decimal to fraction.*

You can graph up to four equations at once, resize the graph and so on. You can convert different units here: *acceleration, angle, area, density, distance, energy, force, mass, power, pressure, speed, temperature, time, and volume. *Great!

## All-In-One Calculator

Even though it includes so many functions, its user interface is still very simple and easy to manipulate. When you launch the app, you can see the main menu, where you can choose an action that you want to make. All options are displayed in circles.

The calculator option is the biggest one and has a special place in many and is divided into several sections. You can choose the calculator for Algebra. You can choose the percentage calculator. You can choose one for elaborate equations. Overall, it is a great multi-functional app for everyday use.

## Financial Calculators

Financial Calculators is a calculator app for real financial professionals. This application includes the complete package of financial calculators needed in an everyday life of financiers.

**Finance and Investment Calculators:**TVM Calculator, Currency Converter, Compound Interest Calculator, Return On Investment (ROI) Calculator, Bond Calculator, Tax Equivalent Yield Calculator and more.**Loan/Mortgage Calculators:**Loan Calculator, APR Advanced Calculator, Commercial Loan Calculator, Loan Analysis Calculator, and many others.**Retirement Calculators:**Retirement Planner, 401k Contribution Calculator, Retirement Savings Analysis, Traditional IRA vs Roth IRA, Required Minimum Distribution, Social Security Estimator and so on.-
**Stock Calculators:**Stock Return Calculator, Stock Constant Growth Calculator, Stock Non-constant Growth Calculator… **Credit Card Calculators:**Credit Card Payoff Calculator, Credit Card Minimum Calculator.**Auto Loan and Lease Calculators:**Auto Loan Calculator, Auto Lease Calculator.**Miscellaneous Calculators:**Regular Calculator, Discount and Tax Calculator, Percentage Calculator, Date Calculator, and others. The list is great!

Users can choose the most suitable and often used calculators and prioritize them for easy access.

Users can send the calculation results to others via email. Financial professionals can email the quote to their clients.

One more benefit of the app is that it works even without an internet connection!

## RealCalc Scientific Calculator

RealCalc Scientific Calculator is Android’s most popular scientific calculator. It has over 20 million downloads already.

It looks like a real hand-held calculator which makes doing calculations habitual. It has all the features of a standard scientific calculator plus history, memories, unit conversions, and constants. It also supports binary, octal and hexadecimal calculations and has an optional RPN mode. RealCalc is easy in use but has full help included in the app.

## Graphing Calculator + Math

Graphing Calculator + Math is a great new learning tool for teachers and students. It offers calculations with simple and complex fractions, mixed numbers,

It offers calculations with simple and complex fractions, mixed numbers, square root, cube and higher roots, exponent, logarithms ln(), log(), log[base](), trigonometric, hyperbolic and inverse functions, complex numbers, binary, octal and hexadecimal numbers. It also includes a graphing calculator.

The free version requires an internet connection and contains ads.

## Mobi Calculator

Mobi Calculator is a good simple calculator app for Android users. It has cool bright skins for you to choose from. The interface of the app is pleasant and clear with large buttons.

**Mobi Calculator features**

* Math expressions calculation (developed on RPN-algorithm but no RPN-calculators’ kind UI!)

* Percentages (calculation discount, tax, tip and other)

* Radix mode (HEX/BIN/OCT)

* Time calculation (two modes)

* Trigonometric functions. Radians and degrees with DMS feature (Degree-Minute-Second)

* Logarithmic and other functions

* Calculation history and memory

* Digit grouping

## Kalkulilo (scientific calculator)

Kalkulilo is a clear and helpful program for different calculations. It includes the following modes:

– **The scientific mode.** It offers all the usual functions and operations like the basic arithmetical operations, power, logarithm, roots, trigonometry, etc.

– **The bit/integer mode.** It offers logical operations (AND, OR, XOR, >>, etc.) on a bit level. All values can be displayed as binary, octal, decimal or hexadecimal numbers. Calculations can be done in 8, 16 32 or 64 bits.

– In **the statistics mode**, you can create a sample by adding several values and then calculate mean, median, quantile values, variance, standard deviation, range, etc.

– **Trigonometry mode** provides lots of trigonometric functions

– **The base/radix mode. **It allows you to do calculations with numbers of base 2 to base 36

– **The Time mode** lets you directly work with time values (hours, minutes seconds)

– **A simple calculator** is also included, with just the basic operators and large buttons.

## Fraction Calculator Plus

Fraction Calculator Plus is the best and simplest app fraction calculations. It has an attractive interface and shows your calculations in a clear and elegant style.

It has a triple keypad that makes typing fast. Every fraction result gets automatically reduced to its simplest form to make your job easy. Every result is also shown in decimal to make conversion a breeze.

Give Fraction Calculator Plus a chance to turn your phone into an everyday helping hand.

## Desmos Graphing Calculator

Desmos Graphing Calculator is a shining replacement to hand-held ones. It’s clean and simple in use.

Just type in any equation you want to solve and Desmos will show you the answer. It can handle square roots, logs, absolute value, and more.

There’s no limit to how many expressions you can graph at one time – and you don’t even need to enter expressions in y= form!

The number of users is increasing every day! Join it too!

## Calca

Calca is a powerful symbolic calculator that gives you instant answers as you type. It solves equations and simplifies complex expressions – it’s a computer algebra system in your pocket! It’s also a rich Markdown text editor so that you can explain your ideas alongside your calculations.

Calca is perfect for professionals and students – anyone who works with numbers and equations. Variables and functions can be created with only a few keystrokes and can be manipulated with a rich library of operators and functions.

## Calculator HD Pro Lite

One of the best calculator apps for iOS. Moreover, it is compatible not only with the iPhone but with the iPad as well. A pleasant bonus while working with this calculator will become its fun and colorful design. It has a dual-line display that allows you to enter the number and see the results simultaneously.

This is the main feature that makes professionals choose this app. Another cool feature here is that it saves all the history of your calculations. It is very convenient – do you remember how many times you would need to calculate two results, but you had to always write down one number, so you can go for another one?

Apart from that, this app can be controlled even by the voice input and compatible with all the latest iOS versions. When you need to solve extra-long equations you can always use the multi-line input.

## Calculator for iPad!

We have already observed some calculator apps for the iPhone, but wait, what’s for a calculator for iPad? Are there any? Because calculating with it can be much easier than with a phone because the iPad is much bigger! Because of the same reason it can become a fun and educating app for kids.

The software itself is very simple, but it includes all the good calculator features, starting with simple actions like adding or dividing and ending with logarithms, square roots, and many more terms, sometimes understandable only by math professors.

Another interesting feature here is that you can even draw with this calculator app or add notes. A great way to use it in your studies. One more cool fact is that it calculates with accuracy to more than 75 significant digits.

## HiPER Scientific Calculator

This is an alternative to the Real Calc app. As you can see from its name, this is a calculator for those who need to solve some advanced equations, maybe calculating the compound interest, maybe solve calculus equations and so on.

People working in such industries as finance, engineering, analytics, and physics will find this app extremely useful. There is no big difference if you decide to choose either this app or Real Calc. Well, maybe an advantage of this one is that it has a more user-friendly interface.

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That was the top list of best free calculator apps. Every single one of these apps has its own set of features and designs, so pick the one that fits you most.