10Calc – a sleek, feature rich Windows Phone calculator

There is a host of calculator apps available in the Windows Phone Store for those who need to go beyond the native calculator that is pre-installed on our phones. 10Calc is a fairly recent addition to the calculator family and hopes that its sleek appearance, fast performance and a library of calculator styles will appeal to most.

Truth be told, as long as a calculator can add, subtract, multiply and divide I'm a happy camper. But many will need a bit more horsepower out of their calculators and in the short time I have spent exploring 10Calc, it comes across as a worthy Windows Phone app to consider.

10Calc's appearance is very clean with the type of calculator displayed in the upper left corner of the screen and your keypad consuming the bottom portion of the screen. The core interface for 10Calc is equally as clean in that you slide to the left to reveal the app's menu and slide to the right to view your calculation history.


The menu offers options to toggle between the various calculators, access the settings and view the About screen. 10Calc's library of calculators includes:

  • Simple Calculator
  • Scientific Calculator
  • Programmer's Calculator
  • Unit Converter
  • Unorthodox Calculator: This includes a base converter, bill splitter, tip calculator, date-time calculator and Day on the Date Converter

Should anything other than the history become available by swiping to the right, 10Calc will alert you of the differences. For example, to set the units of conversion, just swipe to the right to view the unit listings.


Settings are somewhat minimal and include:

  • Accuracy Level: Super Accurate, Scientific (8 places) and Student (5 places)
  • Font Size: Small, Normal and Big (only affects the input display and not the buttons)
  • Theme: Default, Phone Accent, White
  • Start-up Calculator: Choose which calculator will appear when the app launches
  • Pin Live Tile (Transparent)

There is a Gold and Silver Theme available with the Premium version of 10Calc, which will run you $1.29 via in-app purchase. The Premium version will also remove the ad support.

10Calc does have copy support where you can tap on the calculated sum and copy it to your Windows Phone clipboard. There is a bug with this feature in that when you are using the big font, you can highlight the figure, but you cannot copy it.

I did like the viewable history, but the copy feature doesn't extend to the history view. You can swipe between the calculator view and history view without losing any of your work, but I think it could be useful to be able to copy from your history. If for anything, to help make it easier to copy sums from the history and import them into the active calculator.

Overall Impression

The more I used 10Calc, the more the Windows Phone app grew on me. My calculator use is limited, but I can see the appeal 10Calc should have with those who need a beefier calculator. The interface is clean and optimized for one-handed use and the selection of calculator styles is respectable.

All in all, if you are in the market for a Windows Phone calculator that goes beyond the native app, 10Calc is worth trying. It is a free, ad-supported app with the option to remove the ad-support through a $1.29 in-app purchase. 10Calc is currently rated at 4 Stars, which is about right for this Windows Phone app. If you try 10Calc, let us know what you think of things in the comments below.

Download 10Calc for Windows Phone (Free)

QR: 10Calc

George Ponder

George is the Reviews Editor at Windows Central, concentrating on Windows 10 PC and Mobile apps. He's been a supporter of the platform since the days of Windows CE and uses his current Windows 10 Mobile phone daily to keep up with life and enjoy a game during down time.

  • Nice
  • Yeah. The new calculator app in Windows 10 is impressive as well
  • Would have been better if it was designed better. Calculator^2 has more functionality with a much better design.
  • Ya but ads in that app acquires more screen space. Also this app use latest algorithm.
  • Pretty sure the algorithm for adding is pretty much proven.
  • Windows mobile 10 calculator is better
  • Flashlight App from the same dev is great.
  • That "10calc" is annoying.
  • I wondered if it was Rudy for a moment.
  • Well, wait until 10 officially hits GA I bet you there will be a huge spate of 10(insert abbreviated app name here).
  • This is great for my 8.1 device but windows 10 native calculator is pretty complete, windows 10 allowed me to remove 2 apps due to it's native flashlight and the unit converter in the calculator
  • I just tried it. It did not pass a simple test cos(90). Removed.
  • Was it in deg mode? Not Rad or grad?
  • Ah, I see what you mean, a very small number but still not zero
  • Can you please elaborate your test. I am sure i can fix your problem. Thanks :)
  • Not sure why this app is featured here, the design is not good, doesn't follow Windows design language, and it's confusing at first. On the plus side, the developer is responsive, friendly, and open to suggestion. Tried this app when it's launched back then. Posted via the Windows Central App for Android
  • Which Windows design :O at the moment there is not really "one" design
  • Windows Phone 8.1 design, you know with segoe font, pivot navigation and such..
  • The whole app navigation is designed on pivot. Also Segoe sometimes doesn't look good on numbers. Hence the font change. If you have an more suggestions please contact me at debugstudios@outlook.com Thanks
  • I have problem launching the store app
  • Nice to have another calculator app.  But I differ with the conclusion that they say it is the most advanced calculator. The 12C calculator app is based on the historic HP12C caluclator which is one of the most advanced calculators out there.  This real calculator is still being sold by HP after over 25 years.  The 12C app is a very good representaiton of this caclulator.
  • W10 mobile calculator is pretty good, how does this compare?
  • You should definitely try ;)
  • Still W10 calculator and calculator^2 is best
  • I like the Windows 10 Mobile Calculator, as it's actually very complete on its own and looks quite nice.
  • Windows calculator has never worked since the first windows! Simple test: 1+3/3 != 3/3 + 1 :- portrait mode; no brackets to fix the issue! However 1+3/3 = 3/3 + 1 :- landscape mode? At least there are brackets to sort out the Windows standard calculator deficiency in this calculator.
  • Yes, but can it lock orientation? I hate the original calculator switching when I wanted it locked to one orientation.
  • It has only one orientation the portrait mode.
  • The app has a nice layout / appearance, but without RPN / Postfix notation, it is of no use to me.
  • RPN is the base class in 10Calc that kicks off as soon as you press equal button the simple and scientific calculators. If you have any more suggestions please write to me. Thanks
  • It most certainly is not - there is no 'enter' key. 10Calc uses infix notation, requiring operands to be separated by the operators (1 + 2). RPN / postfix notation requires that the operands be entered in series then the operator entered to apply to the most recent operands in the stack (1 2 +). 10Calc is not RPN, having an "equals" button exemplifies this fact, as RPN has no need for it, the operator executes the computation. Prefix (+ 1 2)  and Postfix / RPN (1 2 +) notation is simpler to parse and process for computations, particularly Postfix / RPN is logically easier of the two for human interaction; infix notation (1 + 2) is the traditional method taught in school, commonly known as Arithmetic.
  • Ok let me explain. 10Calc is made and designed for general people who use arithmetic calculations. As many people would not be able to directly enter in postfix notation. However as I previously pointed out as computers cannot directly calculate infix notation, the RPN class available inside 10Calc first convert them to postfix notation. Then, they are pushed to stacks and queues and processed in order as Shunting Yard Algorithm specifies. This results in faster processing. Then output is passed to the screen. If you want to see the code I can show you :) thanks for writing.
  • I appreciate the additional information on what is going on behind the scenes in the app, from a user standpoint, it doesn't matter what method of notation the app is using behind the scenes though. I had noted that my dealbreaker was that it wasn't utilizing RPN, my preferred input method - this was observed the only way a user of the app could, from the actual interface. Now that I have been informed on how it processes user input, it is clear that it should be rather simple to include an additional calculator mode allowing user input via postfix/RPN, thus bypassing Shunting-yard Algorithm and increasing the efficiency of calculation for users that prefer RPN. This would also increase the appeal of your app as it would cater to a wider audience, and by extension, earn you more sales. Personally, I would appreciate a well designed RPN calculator. Presently I use one of the few available in the store, and while functional, it is not designed with great attention to the interface. If a suitable alternative were made available, I would move without hesitation.
  • During the Windows / WP 8 era.. Apps are named either with number 8 or eight. Now here comes the Tens. : )
  • Looks good but the new Windows Calculator has all I need. Keeo up the good work, though.
  • Would be great if it didn't crash. Removed.