You can now run Windows Calculator on Android, iOS, and the Web

Martin Brinkmann
Jun 27, 2019

Microsoft open sourced Windows Calculator under a MIT License in March 2019 and released the source code as well as required tools on the company's GitHub project hosting site.

The MIT license allows third-parties to use, modify, distribute, and even sell the open sourced product released under the license.

The company behind the UNO platform did just that; it used Microsoft's source code to port Windows Calculator to C# and the company's UNO Platform resulting in Windows Calculator releases for Apple's iOS and Google's Android operating systems, as well as a web version hosted by the company.

The web version should run in any modern web browser provided that it supports Web Assembly. The start is a bit slow initially but once Windows Calculator has loaded, everything should work like a breeze.

windows calculator web

Windows Calculator looks and feels like the version of the calculator that is included in Microsoft's Windows 10 operating system.

You may use the keyboard, mouse or touch to run calculations; there is a history to look up previous calculations, and the option to switch from the standard calculator to the scientific or programmer version. Both of these versions offer additional options that the standard calculator does not support.

Options to convert units are provided as well; a click on the currency converter displays options to convert from one currency to another using the day's conversion rates.

The Windows Calculator apps

windows calculator android

The apps are still in development but already released on Google Play and the Apple App Store. You can check them out and download/install them by following these links:

I downloaded the version for Android to test it. The app opens considerably faster than the web version of the Windows Calculator port. It is by no means the fastest opening app on Android but it is fine for an application that is still in development.

The calculator looks and feels like Windows Calculator. You get to use the standard calculator or the scientific or programmer calculator, and may also use the integrated conversion tools.

All in all, a promising start. I'd expect the company to optimize the loading time and responsiveness further before the calculator is released officially.

You can check out the official announcement on the Uno website for additional information. Developers may find the list of challenges useful that the company had to overcome to port the calculator.

Closing Words

You may access Windows Calculator on the Web now or as an application on Android or iOS. The name is different but the inside is the same. If you like Windows Calculator, you might want to give this a try as it replicates the functionality of the default calculator on Windows.

Now You: do you use a calculator app?

You can now run Windows Calculator on Android, iOS, and the Web
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You can now run Windows Calculator on Android, iOS, and the Web
Windows Calculator is now available as a web version and as versions for Apple's iOS and Google's Android operating systems.
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  1. ilev said on August 4, 2012 at 7:53 pm

    Doesn’t Windows 8 know that www. or http:// are passe ?

    1. Martin Brinkmann said on August 4, 2012 at 7:57 pm

      Well it is a bit difficulty to distinguish between domains and files for instance.

    2. Leonidas Burton said on September 4, 2023 at 4:51 am

      I know a service made by google that is similar to Google bookmarks.

  2. VioletMoon said on August 16, 2023 at 5:26 pm

    @Ashwin–Thankful you delighted my comment; who knows how many “gamers” would have disagreed!

  3. Karl said on August 17, 2023 at 10:36 pm


    The comments section under this very article (3 comments) is identical to the comments section found under the following article:

    Not sure what the issue is, but have seen this issue under some other articles recently but did not report it back then.

  4. Anonymous said on August 25, 2023 at 11:44 am

    Omg a badge!!!
    Some tangible reward lmao.

    It sucks that redditors are going to love the fuck out of it too.

  5. Scroogled said on August 25, 2023 at 10:57 pm

    With the cloud, there is no such thing as unlimited storage or privacy. Stop relying on these tech scums. Purchase your own hardware and develop your own solutions.

    1. lollmaoeven said on August 27, 2023 at 6:24 am

      This is a certified reddit cringe moment. Hilarious how the article’s author tries to dress it up like it’s anything more than a png for doing the reddit corporation’s moderation work for free (or for bribes from companies and political groups)

  6. El Duderino said on August 25, 2023 at 11:14 pm

    Almost al unlmited services have a real limit.

    And this comment is written on the dropbox article from August 25, 2023.

  7. John G. said on August 26, 2023 at 1:29 am

    First comment > @ilev said on August 4, 2012 at 7:53 pm

    For the God’s sake, fix the comments soon please! :[

  8. Kalmly said on August 26, 2023 at 4:42 pm

    Yes. Please. Fix the comments.

  9. Kim Schmidt said on September 3, 2023 at 3:42 pm

    With Google Chrome, it’s only been 1,500 for some time now.

    Anyone who wants to force me in such a way into buying something that I can get elsewhere for free will certainly never see a single dime from my side. I don’t even know how stupid their marketing department is to impose these limits on users instead of offering a valuable product to the paying faction. But they don’t. Even if you pay, you get something that is also available for free elsewhere.

    The algorithm has also become less and less savvy in terms of e.g. English/German translations. It used to be that the bot could sort of sense what you were trying to say and put it into different colloquialisms, which was even fun because it was like, “I know what you’re trying to say here, how about…” Now it’s in parts too stupid to translate the simplest sentences correctly, and the suggestions it makes are at times as moronic as those made by Google Translations.

    If this is a deep-learning AI that learns from users’ translations and the phrases they choose most often – which, by the way, is a valuable, moneys worthwhile contribution of every free user to this project: They invest their time and texts, thereby providing the necessary data for the AI to do the thing as nicely as they brag about it in the first place – alas, the more unprofessional users discovered the translator, the worse the language of this deep-learning bot has become, the greater the aggregate of linguistically illiterate users has become, and the worse the language of this deep-learning bot has become, as it now learns the drivel of every Tom, Dick and Harry out there, which is why I now get their Mickey Mouse language as suggestions: the inane language of people who can barely spell the alphabet, it seems.

    And as a thank you for our time and effort in helping them and their AI learn, they’ve lowered the limit from what was once 5,000 to now 1,500…? A big “fuck off” from here for that! Not a brass farthing from me for this attitude and behaviour, not in a hundred years.

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