Opening the iTunes Store.If iTunes doesn't open, click the iTunes application icon in your Dock or on your Windows desktop.Progress Indicator
Opening the iBooks Store.If iBooks doesn't open, click the iBooks app in your Dock.Progress Indicator

iTunes is the world's easiest way to organize and add to your digital media collection.

We are unable to find iTunes on your computer. To buy and download PCalc - The Best Calculator by TLA Systems Ltd., get iTunes now.

Already have iTunes? Click I Have iTunes to open it now.

I Have iTunes Free Download
iTunes for Mac + PC

PCalc - The Best Calculator

By TLA Systems Ltd.

Open iTunes to buy and download apps.


PCalc is the powerful choice for scientists, engineers, students, programmers, or indeed anybody looking for a feature rich calculator. It includes an optional RPN mode and multi-line display, a choice of button layouts, an extensive set of unit conversions and constants, a paper tape, multiple undo and redo, engineering and scientific notation, as well as support for hexadecimal, octal, and binary calculations.

Includes an Apple Watch app, so you can calculate on your wrist!

What's New in Version 3.5.3

Brand new icon!
Added an option to use E notation for the main display rather than superscript numbers.
Added a unit conversion section to the Apple Watch app.
Added a watch complication to quickly access the Apple Watch app.
Added a quick "Reset All Buttons…" command to the layout editing alert if there are any changes.
Added a warning the very first time you try to switch on RPN mode.
Changed the number entry and delete key behaviour to be more sensible for decimals and exponents.
You can now have eight lines of display on a horizontal iPad Pro.
You can now specify certain settings like RPN mode and number of decimal places separately for the app, watch, and widget.
The display mode setting is now used by the watch and widget.
Moved the watch and widget settings into separate new sections.
Fixed a problem with the theme resetting to "Samurai" if you used the automatic night theme option.
Fixed a problem with the minus sign not always displaying properly with the LCD digit style.
Fixed a problem with hiding the status bar when running in split-screen.
Fixed a problem emailing the tape or registers when you 3D Touch the display to peek at them.
Fixed a problem with the "Use Animations" accessibility setting not applying to the splashscreen.
Fixed a problem with VoiceOver for the tape, registers, and RPN stack.
Fixed a problem with existing numbers not being pushed to the RPN stack when starting a new one with the decimal or "Exp" keys.
Fixed a problem with Handoff from the Apple Watch.


iPhone Screenshot 1
iPhone Screenshot 2
iPhone Screenshot 3
iPhone Screenshot 4
iPhone Screenshot 5
iPad Screenshot 1
iPad Screenshot 2
iPad Screenshot 3
iPad Screenshot 4
iPad Screenshot 5

Apple Watch

iPhone Screenshot 1
iPhone Screenshot 2
iPhone Screenshot 3
iPhone Screenshot 4
iPhone Screenshot 5

Customer Reviews

“42” is the meaning of life from HGttG

The number 42 is, in The Hitchhiker's Guide to the Galaxy by Douglas Adams, " Answer to the Ultimate Question of Life, the Universe, and Everything", calculated by an enormous supercomputer named Deep Thought over a period of 7.5 million years. And the Wikipedia reveals 42 to be important in most religions. Thus Calc is both powerful and worthy of use.
Beyond the sense of humor of the developer, PCalc is my go-to calculator for everything beyond basic arithmetic. It’s also easy and great for basic arithmetic, but it feels like using a Shelby Cobra racing car to go to the grocery store. It is very customizable, and the colors available make the keyboard more readable and usable AND attractive, rather than the “designer” keyboards that blend all the keys together graphically, putting style over function. I like this calculator, and I always have. And I’ve never gotten weird calculation mistakes, like I have with several of the calculators I’ve tried. PCalc is a Keeper.

Excellent app that continues to improve

PCalc is the rare app that manages to add features without cluttering the user interface or getting in your way. I was a satisfied customer when I first bought it at Version 1, and I'm even more satisfied now.

PCalc's list of features—unit conversions; base conversions; built-in constants; RPN mode; multi-line display (with your choice for the value of "multi"); user-defined functions and unit conversions; and selectable color themes, keyboard layouts, and digit styles—is impressive, but what's more impressive is the care with which they are implemented. The popup indicators that tell you which key you're pressing, the sliding display that stays on screen as you choose a conversion or change a preference, the stack display that also shows you the contents of the memory slots—these are the small things that need to be done right if the features are to be usable. PCalc does them right.

Finally, PCalc lets you create your own custom keyboard layouts. This, combined with user-defined functions and conversions, allows you to turn it into almost any type of calculator you want. You're getting, in effect, an infinite number of calculators.

A few years ago, the batteries in my physical calculator died, and I never replaced them. PCalc is what I reach for.

Superb App! ... and I Like the New Icon, too.

PCalc is the Swiss Army knife of calculators, and I mean that in terms of features, flexibility, and ease of use. It has an exceptional design and implementation that continues to improve over the years. This is a rare app where the new features really add to the usefulness of the product. If I had to buy my apps all over again, this would be the first app that I would buy; honest and truly.

I am very pleased with the new icon because it makes PCalc so easy to find on the screen. It is much superior to the old icon. If you are looking to buy PCalc and reading these reviews, you should ignore comments about the icon, because the PCalc app itself is so worthwhile. PCalc is probably the best value in the App Store. If you buy it, you won’t regret it.

PCalc - The Best Calculator
View in iTunes
This app is designed for both iPhone and iPad
Offers Apple Watch App for iPhone
  • $9.99
  • Category: Utilities
  • Updated:
  • Version: 3.5.3
  • Size: 15.4 MB
  • Apple Watch: Yes
  • Language: English
  • Seller:

Compatibility: Requires iOS 7.0 or later. Compatible with iPhone, iPad, and iPod touch.

Customer Ratings

Current Version:
All Versions: