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 3.7.3

Improved the iPhone X support a little bit more.

Customer Reviews

Fast and Featureful


This is the one calculator app out of a dozen that gets kept in my dock. Must be some very tight programming by the devs, because it's one of the most responsive calculators I've tried despite also boasting a very long list of features.

Ended up eventually buying almost all the extensions plus a tip for the great work. I particularly like the configurability of the Engineers pack.

Beautifully Designed


This App has a great look to it. It fits closer to the iPhone style than the Apple designed calculator. Thank you for releasing this "lite" version. I have always wanted to try it our but am not a heavy enough user of calculators to justify the full version however the great quality of the App may convince me.

I like it.


Works good and looks good need I say more. :o)


TLA Systems Ltd.
78.6 MB
Requires iOS 8.0 or later. Compatible with iPhone, iPad and iPod touch.
Age Rating
Rated 4+
© 1992 - 2017 James Thomson
In-App Purchases
  1. Conversion Pack $1.39
  2. Complete Pack $13.99
  3. Multiple Line Pack $1.39


  • Family Sharing

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

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