Calculator Plus

A lightweight standard + scientific calculator app.

Calculator Plus v2 – Standard & Scientific Calculator

App IconDownload on the App Store

Price: Free

Developer: Wern
Latest Version: 2.2.4 (macOS, iPadOS, iOS, watchOS).
Homebrew: brew install wxwern/formulae/calculator-plus (temporarily outdated)
Rating: ★★★★★ (4.6 stars)

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Calculator Plus is a standard and scientific calculator that has simplicity at its core, while not compromising on functionality. Even with its simple user interface inspired by the built-in Calculator app on iOS, it offers much, much more.

With full expression and live answer preview, be faster than ever at calculating, see exactly what you typed. Understand your answers by displaying them in exact form, scientific notation, fractions and more. Catch the exact errors with helpful syntax errors, with beautiful animations to complement your calculations. The full scientific calculator is also present in the portrait layout, so now you can calculate scientific operations away one-handed on your phones.

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That’s not all! If you’re on a Mac, or have a hardware keyboard connected to your iPad or iPhone, simply type your math expressions normally and it will be registered – including every scientific operation listed. On an iPad, your Apple Pencil works with iPadOS 14’s Scribble to allow for direct handwritten inputs – no dedicated handwriting panel, just write anywhere on the calculator!

Bonus features: With voice dictation input optimised to understand mathematical expressions, calculate any expression quickly and efficiently. Clipboard support not only allows you to copy your calculations for others to see, it also gives you the ability to instantly take any expression from anywhere and paste into the app.

Download Calculator Plus to experience it for yourself!

Feature List:
– Standard & Scientific Calculator
– Simple UI design puts focus on your calculations
– Live expression and answer display while typing
– Full scientific calculator also available in the portrait layout
– View long operations comfortably with scrollable calculation panels
– Satisfying clicks with haptic feedback on modern iPhones
– Multiple display formats: Exact Form, Scientific Notation, Fractions and more!
– Bi-directional clipboard: Copy & Paste any expression into and out of the app.
– Custom Scientific Typing Mode: Append, Substitute or a hybrid of both.
– Full Hardware Keyboard input (including scientific operations)
– Apple Pencil Scribble support on iPadOS
– Voice Dictation input support
– Useful Syntax Error hints
– Lightweight: About a megabyte in size
– No ads, no tracking :)

If you have or find any problems, feel free to contact me under App Support within Calculator Plus.

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Support me!
This application is provided completely for free with no additional cost. If you enjoy what I do, consider donating to help in further development of apps like these! :)
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If you have any problems or want to seek further queries, please send a feedback at the application feedback page instead. I tend to check messages sent there more often than the comments section, so you’ll get faster replies as well.

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72 thoughts on “Calculator Plus”

  1. How can I get the voice activation or Apple pen write input methods to work? I selected them as alternative input methods but can’t see anywhere how I can do that. There’s no microphone or pen tool symbols that show.


  2. I also tried saying the word “equals” at the end of the numbers I want to be added; it shows the sum, but only if I input a couple of numbers. If I want the sum of, say, 20 numbers, it tells me that there is a syntax error or some such. This can’t be rocked science! A simple tutorial would really help with this app.

    Thanks, JM

    1. Hi JM,

      You should be able to simply say “one plus two plus three equals” and get a result of “6” with the recognised equation being “1+2+3=”. Since you get a syntax error, I believe your voice recognition regional language may include thousand separators that do not match your current app settings (which is powered by Apple’s speech recognition).

      To fix this, you can go to the in-app settings and either:
      (1) Go to “Number Format” and change it, such as “12,345.6 + log(27; 3)” if that’s the format you use.
      (2) Go to “Math Evaluation Overrides” and enable “Fix Foreign Number Formats”.

      I agree that a tutorial would help for some of the advanced functionalities in the app, and I’ll include one in future updates. Thank you for the suggestion.

      Hope this answers your question! :)

  3. The app recognizes numbers input via voice command correctly, but how do I get to the sum? It does not show a running total nor a final total . Pressing the = sign, aborts the calculation as “error” and I start from scratch, the screen never shows the sum of all the numbers I input (OS Ventura 13.0)

    1. Hi Colleen,

      You may go into the app settings and change your preferred calculator layout to standard mode under the option, “Preferred Calculator Layout”.

      Hope this helps!

        1. Hi Marina,

          The option has since been renamed to “Portrait Calculator Layout”, since for now it only impacts portrait mode. It is still found under the app settings and should be the 2nd row in the 2nd group of options counting from the top.

  4. Great app! Would it be possible for you to make the thousand separator show in the larger format instead of just the bottom

    POR EJ. ” 1 245 456.00 “

    1. Hola,

      Puede elegir el formato de número que prefiera. Simplemente vaya a “Number Formatting” en la configuración de la aplicación para hacerlo. :)

      [Traducido por Google]

      Hi there,

      You can already choose the number format you prefer. Simply go to “Number Formatting” in the app’s settings to do so. :)

  6. Hi

    Is users of this this app exposed to commercials of any kind? We`re thinking about using this to our students in Norway (iPads). Commercials in apps are not allowed in Norway. Thanks!

    1. Hello!

      As noted in the app description and screenshots, Calculator Plus does not have ads (short for advertisements), so you shouldn’t see any commercials popping up unexpectedly.

      Hope this answers your question!

  7. Hi

    I am using this app on Mac OS and wanted to know if there is any way of writing “^” using a keyboard in this calculator? I have tried to do this, but haven’t been able to find a way yet.

    I often find myself doing calculations with powers and it’s kind of annoying that you have to manually use the mouse everytime to select the power button

    1. Hi there,

      Apologies for the late reply. Pressing “^” on a keyboard (for example, by pressing “Shift” and “6” on a keyboard with the US/ANSI layout) should let you type it directly into the calculator. Thus, you should be able to type 2^3 directly to get 2 to the power of 3.

      If your keyboard doesn’t have that key, you may instead type “pow(2,3)” (or “pow(2;3)” if your region uses the comma as a decimal separator), which performs the same calculation as “2^3”.

      Hope this helps!

  8. It seems that the calculator loses the content of memory on exit/quit. For my use I found that remembering the content of memory between sessions have some advantage.

  9. I use this on the Apple Watch a lot. The only real improvement that I can think of is on the digits page. It would be better if EE were placed on this page and 0 (zero) made half the size. Another suggestion is to place 1st/2nd on page 2 and mc on page 3.

    A really good app.

  10. Hello,

    I installed your Calculator Plus application, and it works great, however I have the following problem:
    On my keyboard layout the * and ^ characters are accessible with the Alt or with Shift+Alt combined with an other normal key. In the Calculator Plus, non of the shortcuts are accepted with the Alt key.

    Can you help with this?

    Thank you in advance,
    Zoltan Laszlo Ferenci

    1. Hi Artem,

      The keyboard shortcut for the AC button is the esc key (or command + . on keyboards without the escape key).

      More keyboard shortcuts can be found through the Menu Bar on a Mac, or by holding down the Command key on an iPad.

      Hope this helps!

    1. Hi Zoltan and other commenters,

      Sorry for the delay: thousands separators in the form of spaces have been added in the latest version 2.1! Commas are not used as they are reserved for functions with two input values, and for regions using the comma as a decimal point, while spaces are internationally recognised.

      Hope that helps!

  11. I have the previous version of this app on my iPad with hidden photos that I cannot access, how can I recover those photos

    1. Hi Edward,

      There may be a mix up here, as this calculator app I developed has never offered photo hiding functionality in the past. You may have an app with the same name, but that should be by a different developer. As a result, I’m unable to provide assistance with your issue.

      Sorry about that, and hope this clarifies!

  12. I have used your calculator app for many years now. It has performed extremely well. It is simple and powerful.
    Can you tell me how to limit the answers to 3 decimal places.
    Kind regards Basil

    1. Hi Curtis,

      The app you’re commenting on is Calculator Plus, which isn’t designed to store your personal data. Are you referring to Personal Diary?

      If so, do contact me via email directly from within the Personal Diary app, and I’d be happy to assist you further.

  13. There is a bug, the app crashes if you press mr and mc in sequence (with nothing in memory). Can you please fix it ? Thanks.

    1. Hi Neel,

      To do that, for example 5 minus -3, you can type something like “5-(-3)” exactly, including brackets, and it’ll spit out the answer “8”.

      Hopefully this helps! :)

  14. Standard calculator displays but can’t switch to,or access the scientific calculator. No setup option showing or change view or any other option accessible. How to access extended functions?

    1. Hi Ettore,

      To view the scientific calculator, just rotate your phone to landscape mode while using the app. Make sure to turn off Portrait Orientation Lock in control centre as well if the app does not auto-rotate.

      Can you try that?

  15. Thanks for developing and distributing this free of charge Wern Jie. I’m impressed you used Swift.
    But how do I use it to calculate the cube root of -80538738812075974? This is one if the variables in the proof for the Diophantine equation k=42.

  16. I paid 99 cents for this app because you claim I can paste in a calculation to be performed in the app. Well, it can’t even do this correctly: 139,030 + 59,557 + 820,133. It gives me 133 for the answer.

    1. Hi there,

      This app is free of charge, so you shouldn’t have paid for the app.

      Unfortunately, it seems to have a bug with handling commas, but I’ll fix it in a future release. For now, please refrain from copying content formatted with commas.

      Hope this helps!

  17. Very good app. I like the fractions feature. Keyboard appears very similar to the calculator app on the iPhone, however there does not appear to be a +/- feature to reverse a positive answer to negative or vice versa. Is there a way to do this without using the memory in landscape orientation as a scientific calculator?

    1. Hi Alex,

      Can you make sure you did not enable “Rotation Lock”? That will lock the rotation of your phone to portrait mode, causing the app to not rotate to landscape for the scientific view.

      If you do, try turning Rotation Lock off and try again.

      Does this work?

      1. It does. Thank you. Now I seem to be stuck in a mode of fractions instead of decimals but I will figure it out

        1. Hi Alex,

          You can disable fractions (answer simplification) by tapping the answer and selecting “Don’t Simplify Answer”. This will force the app to display calculations in decimal form.

          Hopefully this helps!

  18. Love the simplicity and a free, no-ads app. Great work. Any chance you can allow the app to show an icon in the Control Center for quick access to it?

    1. Hi,

      As of iOS 12, adding an icon to the Control Center is not supported. I’ll try to add quick access to areas around iOS if possible.

      Glad you liked the app!

  19. It’s a nice app but why are percentages broken? It won’t let me just type a simple percentage subtraction, eg. 100-10% on your app equals 99.9?

    1. Hi Adam,

      This app is designed for accuracy in representing equations mathematically, and “percentage subtraction” isn’t actually a valid mathematical operation. What happens when you attempt to do so is that since 10% is equal to 0.1 when directly converting percentage to decimal, 100 – 10% = 99.9. I presume what your looking for to deduct 10% from 100 is to do:

      100 x (100% – 10%) = 90

      Hope this helps!

  20. It is worth it to leave a rating and comment for providing a needed app without ads. Thank you. I use this almost everyday. Only wish the viewing bar was white instead of black background, to make it more pleasant to see.

  21. Thank you. That’s all–no demands. You definitely deserve to know that We appreciate your hard work and generosity. I don’t know if Karma truly exists, but I hope so, and I believe that you must have wonderful things in your future.

  22. Thanks very much for this simple version for iPad calculator.
    I experienced many apps of calculator for my iPad ,but finally I liked this one for its simplicity so I cancelled all but this one.
    Here I asked you to improve it and below my notes:-
    1. When we in (DEG) mode the button shows rad, so you had better to show DEG or RAD .
    2. Add more mathematical calculations.
    Thanks in advance.
    Best Regards.

    1. Hi Adnan,

      Thank you for the suggestion.

      I’ll try to include features as you have stated in future versions of the app.

      Glad you liked it!

      Wern Jie