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 3.9.3

Added contextual menus for the display on iOS 13.
Added a new alternative icon, "Cheri".

With the "Power User Pack" installed:
Added an option for the widget to use an advanced layout with many more functions.
Added copy and paste as ASCII/UTF-8/UTF-16/UTF-32 to the contextual menus on iOS 13.
Added a "Haptic Touch" section to the settings on iOS 13, to configure the app icon menu.

With the "Multiple Line Pack" installed:
Added options to the display settings to turn off contextual menus and drag and drop.

With the "Conversion Pack" installed:
Fixed a problem with user constants not syncing to the Apple Watch app.
Fixed a problem with some of the 3D/Haptic touch commands not working.
Fixed a problem with dragging between display lines in dark mode on iOS 13.

Ratings and Reviews

4.0 out of 5
22 Ratings

22 Ratings

Whapper Stan ,

Touchy, feely!

This calculator is amongst the most tactile available. It fulfils most requirements effortlessly and looks (and sounds) virtually like a physical object.

Perfection would be for it to include all the functionality of the twenty or so other calculators I use, with conversions, pasting from clipboard, a larger RPN stack, a 'tape' history allowing historic substitution, etc.; but yes, I'm dreaming…

The 42 calculator is amongst the best and has had a permanent home on various devices here since I discovered it years ago. Top notch!

rajat_magic ,

No financial functions

This has all the features to be a perfect calculator app. It is simple when I’m looking for simplicity, and powerful and customisable when I want more. It even has RPN, the lack of which rules out so many calculators for me.

Unfortunately, it has almost no financial functions (apart from an ultra simple “tax” calculation). This is quite a large category of functions to miss out on completely. I was hoping for at least the basics like NPV, IRR, annuity calculations, etc. Unfortunately, the app completely fails in that regard. If it could replace all the functions on the HP12C for instance, that would make this perfect.

Skorpeeus ,

Best calculator ever!

With the expansion packs, there is literally nothing you can't do calculator-wise with this app: everything is 100% customisable, right down to having a dark theme for the widget. Plus, Jame's tech support is really responsive and helpful. Highly recommended.


TLA Systems Ltd.
104.7 MB

Requires iOS 10.0 and watchOS 3.0 or later. Compatible with iPhone, iPad and iPod touch.



Age Rating
In-App Purchases
  1. Theme Pack £0.99
  2. Programmer Pack £2.99
  3. Engineer Pack £2.99


  • Game Center

    Challenge friends and check leaderboards and achievements.

  • Family Sharing

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

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