Best Calculator Apps for iPhone and iPad in 2021

While the stock calculator app on your iPhone can be handy for everyday calculations, it lacks more advanced functionality and features. If you often need to do complex calculations such as for your business or a student, accountant, scientist, etc. It’s good to explore other options. Luckily, there are many excellent choices to pick from these best calculator apps for the iPhone and iPad.

  1. Kalkyl
  2. The Calculator
  3. Calculator
  4. CalConvert: Currency Converter
  5. Calculator +
  6. Calzy
  7. EduCalc Classic
  8. Calculator HD ++
  9. PCalc Lite
  10. Xmart Calculator Pro

1. Kalkyl: Editor’s Choice

Kalkyl iPhone and iPad Calculator App Screenshot

Here’s one of the most comprehensive and intuitive calculator apps you’ll ever use. It has all of the features of the default iOS calculator, and you can opt to pay $4.99 yearly to get a pro version, which comes with a choice of two app icons, currency conversion, and more.

Further, it includes graphs and supports haptic touch on compatible devices. You can also undo by shaking your device as well as redo if you need to. It offers app-wide dynamic type support and looks so good that you will probably prefer it to your iPhone’s default calculator.

Price: Free (Kalkyl Pro – $4.99)

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2. The Calculator

The Calculator iPhone and iPad App Screenshot

If you often need to do many calculations, you will enjoy using this app that’s packed with a wide variety of features. Along with being easy to use, it’s incredibly customizable, with the option to change the shape of the buttons and the background.

It’s ideal for both necessary calculations as well as scientific ones. There are add-ons available if you need extra functionality, and It supports Voice Control, Dark Mode, Split View, and Drag and Drop.

Price: Free (Premium Membership Monthly – $1.49)

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3. Calculator

Calculator iPhone and iPad App Screenshot

This calculator app has over 80 different themes to choose. It lets you easily switch between addition and subtraction and is ideal for quick everyday calculations.

It has big buttons and an attractive interface, which makes it a breeze to use. It’s ideal for everything from balancing the books to kids doing homework—an ideal companion for other math apps that your children can use.

Price: Free (Ad Free Calculator – $4.99)

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4. CalConvert: Currency Converter

CalConvert Currency Converter iPhone and iPad Calculator App Screenshot

Here’s the best advanced scientific calculator app for iPhone and iPad, including a currency and unit converter. It has a handy history function that saves all your calculations for future reference.

There are 27+ categories and over 600 units to convert for your convenience. You can also convert 150+ currencies. So whether you’re traveling to foreign countries, figuring out cooking volumes, or solving complex math equations – this app can help you out.

Price: Free (In-app Purchases start from $1.99)

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5. Calculator +

Calculator + iPhone and iPad App Screenshot

Calculator+ offers everything you need in a calculator and displays it all in a sensible UI that’s intuitive to use. It looks clean yet eye-catching, which makes it a visually appealing calculator.

As for features, it supports handwriting, advanced editing to go back and forth quickly, many scientific functions, fractions, and percentages, etc. More advanced functions are possible through in-app purchases. It also works on Apple Watch.

Price: Free (In-app Purchases start from $2.99)

Download

6. Calzy

Calzy iPhone and iPad Calculator App Screenshot

Check out this elegant modern calculator for your day to day mathematical needs. It has plenty of useful features like a Memory Area to store multiple numerical values to reuse and a unique bookmarking option.

Moreover, it can spell out the calculation result in English & 65 other languages. It works well with all the latest iOS features like Drag and Drop (for iPhone & iPad), Haptic Touch, etc. It also looks visually appealing on your iPhone, iPad, and Apple Watch.

Price: $2.99

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7. EduCalc Classic

EduCalc Classic iPhone and iPad Calculator App Screenshot

Here’s a scientific and graphing calculator that provides powerful features for students and scientists. The essential arithmetic functions support the square root, cube root, nth root, logs, absolute value, factorial, permutations and combinations, random integer, bell curve, and more.

It also includes constants like the speed of light, the strength of gravity at Earth’s surface, etc., so that you don’t have to keep entering the value. Further, there’s a reference list of formulae for algebra, differential and integral calculus, geometry, trigonometry, vectors, vector calculus, and classical mechanics.

Price: Free (Remove ads – $0.99)

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8. Calculator HD ++

Calculator HD ++ iPhone and iPad App Screenshot

Keep a record of all your calculations with this app that lets you can delete one number at a time if you make a mistake, instead of starting the whole problem all over again. It has multiple workspaces, so you can do calculations on one and plug the results into another without having to clear it.

The paid version frees up a bit more space so that the last line of calculations is always visible. The ability to go back to review your calculations later is incredibly useful. It has many other cool features like a right and left-handed mode for comfort.

Price: Free

Download

9. PCalc Lite

PCalc Lite iPhone and iPad Calculator App Screenshot

PCalc is an excellent calculator app for scientists, engineers, students, programmers, or anybody looking to perform complex calculations. It offers a multi-line display, a choice of button layouts, an extensive set of unit conversions and constants, multiple undo and redo, and much more.

Further, the orders of magnitude are better than the stock calculator app. You can also add the additional features that you require through in-app purchases. This makes it an affordable and intuitive experience.

Price: Free (In-app Purchases start from $0.99)

Download

10. Xmart Calculator Pro

Xmart Calculator Pro iPhone and iPad App Screenshot

Here’s a smart calculator that’s well-thought-out and implemented. It is programmable with your functions, making it a breeze to solve all kinds of mathematical problems.

It offers way more than the standard operations, and it intelligently shows results as soon as the expression is updated. The customizable colors also allow it to be personalized, which is a nice touch.

Price: $5.99

Download

Top Calculator Apps for iPhone and iPad

So which is your go-to calculator app on your iPhone or iPad? Please share with us in the comments below. You might also check out our recommendations for other top productivity apps that make life easier.

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I have been writing about tech for over 10 years now. I am passionate about helping people solve their tech problems with easy and practical solutions. At iGeeksBlog, I write and edit how-to guides and accessory reviews for all things Apple. My work has previously appeared in Live IT and Woman’s Era magazines. When not working, I love reading and traveling.