A simple calculator that will suit your everyday calculation needs. Calculate decimals, percentages & much more in this beautifully crafted top bar app.

PLEASE NOTICE: 50 first calculations are free. After that you have to upgrade to the full version.

This calculator is a simple and beautiful calculator, that will handle all your everyday calculation needs. It's retina ready, can be moved around in the window or stick to the top bar, you can make it transparent so it's not that noticeable, set it to start at login, make a global shortcut to activate the app or even change the design!

If you have any questions, feedback or complaints about the calculator, don't hesitate to contact us using the support link. If you like the calculator a positive review is always appreciated.

• Basic calculations
• Up to 40 numbers in display
• Retina optimized
• Can open on startup
• Transparency can be toggled
• Multiple design choices
• Copy/Paste numbers
• Option to set global shortcut
• Can be moved around in window
• Calculation operators visible in display
• Adjust number of decimals shown

• Compatible with OSX Mountain Lion (10.8) and optimised for OSX Maverick (10.9)
• Minimalistic and professionally designed graphics
• Numpad keys fully supported
• Visual response in calculator when keyboard buttons are used
• Active operand is show inline in the calculator display
• Copy/Paste numbers to and from the calculator by using the normal copy/paste shortcut
• Calculator supports %
• Dot is showed as "," or "." depending on the region of the world you live in

• Copy number to clipboard: [Command + C]
• Quit the calculator: [Command + Q]
• Hide the calculator: [Command + H]
• Show settings and add-ons: [Command + S]
• 1, 2, 3, 4, 5, 6, 7, 8, 9, 0: [Numbers]
• Add: [+]
• Subtract: [-]
• Multiply: [x or *]
• Divide: [/]
• Percent: [%]
• Evaluate: [Return or Enter]
• Dot: [. or ,]
• Clear: [C or Clear]
• Delete single number: [Delete]

What's New

Version 3.6.0

• Improved functionality
• Bug fixes

Ratings and Reviews

4.8 out of 5

188 Ratings

188 Ratings

Clean. Unobtrusive. Stable.


Calculator Pro has everything I want in an accessory app — always there and ready to spring into action with a single click in the Menu Bar. It is a beautifully crafted app with the full functional feature set of a standard calculator, and I don’t know of any other full-featured calculator with its minimalist footprint.

One reviewer cites an issue with possible excessive CPU utilization which I have not personally experienced and, therefore, cannot speak to. I can say, however, that in all the months I’ve been using Calculator Pro in Auto Start mode, I think I would’ve noticed it at least once but never have.


Ashley Citibnker

As a previous reviewer mentioned. I was experiencing on my MacBook the fan running loudly and when I checked what was running in the background as per CPU percentages Calculator Pro was extremely high Over 651% usage. I was alarmed due to the fact that this is supposed to be only a calculator app. Once I quit the application my CPU percentage came down and my fan stop running. I liked the application but I wont risk frying my CPU from over heating I will be deleting app.
** I emailed the developer and he responded quickly he said he will look into the CPU usage I will update my review once the CPU usage is resolved. Thank you for the quick response

Nice clean professional


Was looking for simple business calculator (didn’t need scientific features). This app hit all the marks, clean, easy to read, you can build up simple calculations. It doesn’t have the M+ (memory button) which seems a bit odd, however given the other strengths a solid app.


Holger Sindbaek
5.6 MB
Age Rating
Rated 4+
© BetaUnltd LLC


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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