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.PCalc Lite is a fully functional and free taste of our very popular scientific calculator. It includes an optional RPN mode, multiple undo and redo, unit conversions and constants, as well as two stylish themes and our highly praised design. A great choice for your new iPad!

If you like what you see, the full version has many more settings and themes, a paper tape, engineering and scientific notation, and full support for hexadecimal, octal, and binary calculations. You can also now purchase extra features directly from inside PCalc Lite. Buy them individually, or buy everything.

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

What's New

Version 3.7.5

The display is now smarter about using the available space.
The About screen now has an ambient electronic soundtrack composed by Squillopian.
Improved the iPhone X support yet again.

With the "Power User Pack" installed:
Added an option to show x10 in scientific notation, in the Advanced settings.

With the "Multi Line Pack" installed:
Added options to turn off the labels and info on the display.

With the "Engineer Pack" or "Programmer Pack" installed:
You can now use hyperbolic trigonometry in user functions and conversions.

With the "Theme Pack" installed:
You can now change the tint color for the themes "A Touch of Color", "Blue Sun", "Brawn", "Flux", "Primary Colors", "Rough Draft", and "Widget".

Ratings and Reviews

Enjoyable to use. Good range of functions and personalisation

Mr Edward

Provides a good range of basic and advanced functions as well as having high quality graphics and voiceover option. Displays"paper tape" but missing the ability to edit calculation steps stored in this way. I still give it five stars for the overall package (and "hitchhikers guide to the galaxy" reference)!
In app purchases are fairly priced. I ended up buying all of them to allow full customisation: you end up with the same app as the up-front purchase option and I prefer the orange app icon anyway.

Only ad free full featured calculator app


This should be at the top of the App Store it is the best calculator app out there with options for every type of math.
I only need it for the basic stuff but i appreciate the work that's gone into this app.
The one I had before this was the top of the search results but had pop up ads and even auto open links it was a spammy piece of junk.
Love the spilt screen mode

Best Watch implementation

Norton from Oz

PCalc has the best implementation on the Apple Watch. You can delete one digit at a time, not just All Clear (AC), and you can tell which operator (+, - etc) you are using.

In addition to clicking on the "...", I wouldn't mind being able to swipe between screens.

Great stuff.


TLA Systems Ltd.
91.3 MB
Requires iOS 8.0 or later. Compatible with iPhone, iPad and iPod touch.
Age Rating
Rated 4+
© 1992 - 2018 James Thomson
In-App Purchases
  1. Conversion Pack $1.49
  2. Complete Pack $14.99
  3. Multiple Line Pack $1.49


  • Family Sharing

    Up to six family members will be able to use this app with Family Sharing enabled.

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