PCalc Lite 4+

The Best Calculator

TLA Systems Ltd.

    • 4.2 • 36 Ratings
    • Free
    • Offers In-App Purchases


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 3.12.1

Added support for iPadOS 16, including Stage Manager.
Added support for multiple windows on iPad.
Improved theme drawing performance.
Fixed a problem with the recent conversion text getting too small with long unit names.
Fixed a problem with the "Round to Floor" and "Round to Ceiling" user function commands with negative numbers.
Fixed a problem with the "Modulo" function with negative numbers.
Fixed a crash when clearing a memory from the contextual menu.

With the "Power User Pack" installed:
Added a new per-calculator rotation lock option for iPhones on iOS 16.

With the "Conversion Pack" installed:
Added an "EV Efficiency" section to the conversions.
Fixed an ambiguity when displaying some currency symbols like Yen and Yuan.
Fixed some cosmetic problems with the user functions and conversions editor.
Fixed a problem editing the name and images for custom function, conversion, and constant categories.

With the "Engineer Pack" or "Programmer Pack" installed:
Now interpret text starting with "0x", "0o", or "0b" as hex, octal, and binary numbers.
Improved handling of button selection in the layout editor.
Fixed a crash when adding or duplicating a layout on iPad.

Ratings and Reviews

4.2 out of 5
36 Ratings

36 Ratings

Viennathecat ,

Keyboard clicks

This app is really fab but I wish the keyboard sounds would still emit when the Ring/Silent switch is set to off - I would like to hear the clicks but not notifications sounds

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.

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!

App Privacy

The developer, TLA Systems Ltd., indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Linked to You

The following data may be collected but it is not linked to your identity:

  • Diagnostics

Privacy practices may vary based on, for example, the features you use or your age. Learn More


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