Calculator Expert is the most precise mathematical app for your Mac. It lets you conduct an unlimited amount of calculations accurate to the very last digit.

Calculator Expert uses a highly precise mathematical library. Thus it doesn’t have to approximate the result and guarantees that you get mistake-free calculations even if you’re doing trigonometry.

The computation history is stored within the app. You can view, edit and erase your calculations any time you want to. Moreover, prior results can be used to carry out new calculations.

All the arithmetic operations and more than 25 mathematical functions are fully supported. Addition, subtraction, multiplication and division are complemented with roots and logarithms of any degrees.

Calculator Expert outstanding features:

The ultimate precision. Calculator Expert is as accurate as mathematical suites and it’s not that expensive at all

Universal functionality. Calculator Expert is perfect both for everyday calculations and for technical purposes

The interface you love. The Calculator Expert interface mimics the standard iPhone Calculator. Getting used to it takes you no time

Editable history. All the calculations you need can be stored for an unlimited time. Unnecessary ones can be deleted easily

Different angle measurement systems. Carry out calculations in radians or degrees

Copy&Paste support. Conduct massive calculations instantly with the ability to duplicate results you’ve already computed

Automatic digit grouping. Numbers break up into groups of digits in accordance with your regional standards

Continuing computing. Get any numbers from your computation history to carry out new calculations

State saving. Your calculations are not erased when you quit the app

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What’s New

Version 1.3

Computation sequence logic improvements
x^2 and x^3 works the right way now
Added support for keyboard input
Added copy/paste for history and input
Added decimal separator based on user’s locale
Added ability to move window by any point

Ratings and Reviews

3.8 out of 5
27 Ratings

27 Ratings

Chtx ,

This app is good

It is a good calculator. It would give it 5 stars if the backspace button actually deleted individual numbers. However, the delete button works as an all clear. The Clear, All Clear and non-existence of way to delete an individual number leave me frustrated many times. Other than that, I really like the layout and interface. This is a nice and handy calculator!

ExpectingMost ,

This app still isn’t worth the money

Normally a calculator stops calculation after you press the “=“ sign. If you press another operator “+-/*” then it will continue calculation. This calculator does something weird in the case that you do not press another operator. Look at the history of the app, look at previous reviews. No updates since March 20, 2012. No responses from developer. The people who “love” the app don’t say any words, and the people who have problems with it do. Regardless of what the overall star rating is, this should be a red flag.

There are several other bugs with this app. Save your money.

LauBunz ,

AC zeroes the memory

I picked this calculator because it had some scientific items on it. What it needs to be added is the capability to use parenthetical calculations.

The one major bug that irritates me the most is that the “AC" button zeroes the memory; that is what the “mc” button is for. The “mr" button stays highlighted but is zero.


Pavel Tarabrin
1.8 MB

OS X 10.5 or later



Age Rating
Rated 4+
© 2011 Synaptic Wave


  • Family Sharing

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

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