9 Best Free Calculator Apps for Android
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“You won’t have a calculator with you everywhere you go,” our math teachers used to warn us. And now, well, we have smartphones with us everywhere The Best Smartphones for Students in 2016 The Best Smartphones for Students in 2016 Before heading back to school this season, consider getting a new smartphone. Think a daily driver! But what are the best smartphones around? Read More we go, and we have access to hundreds if not thousands of calculator apps.

But because there are so many options, it can be hard to nail down the right one for your needs. Today we’re going to break down the best free calculator apps for Android.

Calculator (by Google)

This is your simplest, safest bet. Google made a bare-bones, yet well-designed app that’ll will handle your easy math tasks, and not much else. It calculates in real time, so you don’t even have to reach for the “=” button.


You can get some more complex functions by swiping in The Swipe Trick in iOS Calculator You Never Knew The Swipe Trick in iOS Calculator You Never Knew There's a simple trick in iOS Calculator that most people don't know about, but it's a useful one! Read More from the right side, but it’s still a rather limited set. As far as other features go, you can tap on the top of the screen to reveal a three-dot menu that will allow you to change decimals to fractions — and that’s about it. There’s no history or graphing.

It is 100% free and ad-free, though, so as far as basic no-frills calculators go, it gets the job done (unless, of course, you’re trying to live Google-free Here's How You Can Use Android But Ditch Google Here's How You Can Use Android But Ditch Google Want to use your Android smartphone or tablet without Google? Want to use open source software? Here we take an in-depth look at exactly how to do that. Read More ).

Download: Calculator (Free) on the Play Store

Calculator ++

If the Google Calculator is a little too basic for you, try Calculator ++. This app has both a Simple and a Engineer mode depending on your level. It supports a wide variety of functions, a history of everything you’ve calculated, and it can even create graphs. One neat little feature is swipe-able buttons. Swipe up on a button to activate the option in the top part of that button, and swipe down to activate the option in the lower part.


It’s also customizable, with several different theme options available. It has a widget for your homescreen, and it says it has a floating window mode, but that might just be for Samsung devices because I can’t seem to access it on my OnePlus One.

There are ads, but they don’t display on the calculation page, only on side pages like History. You can remove them for $3.99. Overall, it strikes a nice balance between simple and functional.

Download: Calculator ++ (Free) on the Play Store

Calculator (by Asus)

Most phone manufacturers Android Skins Explained: How Do Hardware Makers Change Stock Android? Android Skins Explained: How Do Hardware Makers Change Stock Android? Hardware makers like to take Android and morph it into something that is entirely their own, but is this a good or a bad thing? Take a look and compare these different Android skins. Read More release some kind of tweaked calculator app for their devices, but Asus went a step further and made their Calculator app available for all devices running Android 4.1 or newer.


And it’s actually not a bad app. It’s simple, but it has a floating window mode that’s activated by a Chat Head-like bubble. You have to press the equal button to get an answer, unlike in the last two apps in this list, but it does come with a built-in currency converter and unit converter.

Download: Calculator (Free) on the Play Store


ClevCalc is actually a bunch of calculators all in one. Not only does it have the basics, like a currency and unit converter, but it also has everything from a fuel cost calculator to an ovulation calculator. Seriously.


It has a bunch of different themes, and a constant banner ad along the bottom. Unfortunately, you can’t pay to remove the ad, but it isn’t too intrusive. Design-wise, the app plays nicely with Material Design 6 Gorgeous Material Design-Inspired Music Players for Android 6 Gorgeous Material Design-Inspired Music Players for Android Looking for a music player that's been updated with Material Design in mind? Look no further! Read More .

Download: ClevCalc (Free) on the Play Store

Calculator (by TricolorCat)

Yes, another app just called Calculator. This one is probably best for folks who are super particular about their keyboard layout because it has three different layout styles: Standard, Stylish, and Ergonomic.


It also has a ton of different color options and the option to add or remove the memory buttons. Other than that, you can change how decimals appear (1.5 or 1,5) and view your history by swiping down from the top — and that’s it. It’s super simple, but also more customizable than most simple calculator apps. It does have a banner ad along the bottom, but that can be disabled by downloading the Pro version for $1.50.

Download: Calculator (Free) | Calculator Pro ($1.50) on the Play Store

Scientific Calculator

This app by CalcTastic is for those of you who need more scientific calculation options. It has a basic calculator too, but the emphasis is clearly on the scientific portion. You can work on more complex problems to your heart’s content, but it isn’t able to graph anything.


It’s also nicely customizable, with some classic scientific calculator themes and a more basic light theme. If you upgrade to the Pro version for $0.99, you get 7 more themes, Polar-Form complex Numbers, landscape support, and a Programmers calculator.

Download: Scientific Calculator (Free) | Scientific Calculator Pro ($0.99) on the Play Store


Finally, an app with a somewhat original name (even if it is just a shortened version of “calculator”). CALCU has both basic and scientific layouts, a bunch of nice themes, and even an option for adjusting the font in the app.


It has swift little swiping animations — like swiping down to reveal the history or swiping up to reveal more scientific buttons. There is a banner ad along the top that can be removed by a $1.99 in-app purchase.

Download: CALCU (Free) on the Play Store

One Calculator

This calculator app is so beautiful, and I realize that sounds weird, but it’s true. It just has such a nice Material Design-inspired aesthetic, smooth transitions and animations, and a great color scheme. It also has a matrix calculator, a converter, and a grapher.


Unfortunately, other themes have to be bought for $1.49 each, but that’s the price to pay for an otherwise free and ad-free calculator that covers all the bases: basic, scientific, and graphing. It’s honestly just so intuitive and fluid, I can’t see any reason not to use One Calculator..

Download: One Calculator (Free) on the Play Store

Desmos Graphing Calculator

For those who want just a dedicated graphing calculator app, this is the app for you. There’s not even a basic calculator interface here — it’s all about the graphs. Easily program in and plot multiple functions, use sliders to adjust them, and you can even start with some of the app’s example graphs.


If you want, you can make an account to sign-in and sync your graphs. Best of all, there are no ads and no in-app purchases.

Download: Desmos Graphing Calculator (Free) on the Play Store

Which Is The Best?

Going into this, I was a fan of the Google Keyboard (I mean, I’m a fan of basically all of Google’s apps), but One Calculator really impressed me. Still, each of these apps has its strengths and weaknesses, so it’s worth trying out a few before settling on which works the best for you. And if you liked these, it’s worth looking for a budget calculator Get Back on Track with These 5 Great Budget Calculators Get Back on Track with These 5 Great Budget Calculators Read More or a new car/home calculator 5 Calculators to Decide If You Can Afford a New Car or House 5 Calculators to Decide If You Can Afford a New Car or House Taking out a loan can be a complicated procedure, but figuring out if it's a good idea in the first place can be even more difficult. Read More .

Which of these calculator apps is your favorite? Or did we miss one? Let us know in the comments below!

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    August 31, 2016 at 2:07 pm

    I think CalcNote is most useful calculator.

  2. John Smedley
    August 29, 2016 at 9:15 pm

    Some good calculators listed, but take a look at PowerOne FE. It is a scientific and financial calculator in one. It works with a variety of templates and also allows you to design your ow Excellent app; have used it for years now.

  3. unmesh
    August 29, 2016 at 3:39 pm

    their is problem in direct calculation in app
    for ex. we calculate 12+12+12 X 6 = 216
    but in calculator app in android shows ans is 96

  4. Michael
    August 26, 2016 at 10:23 pm

    No question...i use it everyday - Multi Calculator by LemonCli because it also does conversions (currency, volume, length, you name it).

  5. Dominic Richens
    August 26, 2016 at 2:29 pm

    Big fan of "RealCalc" It has an RPN node which is a must for a longtime HP calculator user. It also does HEX/OCT/BIN.

    I'm also a user of the WP-34S - I have two physical versions and I use it on my laptop. I would use it too on my Android if such an app were available.

    • Dominic Richens
      August 26, 2016 at 2:30 pm

      Why is there some lady's photo next to my comment?!

  6. BH Bezuidenhout
    August 26, 2016 at 9:36 am

    Powerone (originally from IOS) is the most powerful full stop.

  7. Mairim Vant
    August 26, 2016 at 7:17 am

    I have several that I like to use, but TechCalc+ from roaming squirrel is by far the best one that I have used.

  8. Math Nut
    August 26, 2016 at 2:39 am

    Graphing Calculator + MATH Pro is awesome!



  9. Alex Rodriguez
    August 25, 2016 at 8:43 pm

    I use one that not a calculator as such it is a handwritten math calculator. It's called myscript calculator. You hand ? write your calculations and it will give you the results. Including algebra and scientific calculations

  10. Jon
    August 25, 2016 at 5:32 pm

    Have a look at
    CalcTape Taschenrechner by schoettler Software GmbH.
    I like the tape with history of calculations and comments.
    They have a free desktop version as well.

  11. Anonymous
    August 25, 2016 at 4:48 pm

    I love Fraction Calculator by Digitalchemy