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

Version 3.11

This app has been updated by Apple to display the Apple Watch app icon.

Added support for iOS and iPadOS 15.
Added support for watchOS 8.
Added the ability to link calculations to notes via Quick Note on iPadOS 15.
You can now use explicit "floor" and "ceiling" rounding in user functions and conversions.
Fixed a number of icon problems.
Fixed a problem with the "Use B&W Icons" option for the Apple Watch resetting.
Fixed a problem creating custom functions, conversions, and constants after resetting iCloud data.
Fixed a crash with the Registers popup on iPad.
Fixed a crash when editing layouts on another device.
Fixed a crash when rotating the device.
PCalc now requires iOS 12.1 or later.

Ratings and Reviews

4.6 out of 5
62 Ratings

62 Ratings

Steve Tsuida ,

The first calculator that made me want to learn how to use all of the “weird” buttons.

This is the first calculator that made me want to sit down and learn how to use all the functions on calculators that I haven’t had to use since high school. It’s just flat-out beautiful, and deep, and clearly made with care and love. When’s the last time you could say you fell in love with a calculator?

I almost forgot, this is one of the most iOS-integrated apps out there. It comes with a fantastic Widget, and the best smart watch calculator app EVER—for any platform, not just WatchOS—thanks to its swipe-up function keys.

ShadowWalkerCA ,

Simply the best Calculator application

I have have used numerous calculators applications. I have also used, and purchased many just ok Calculator applications. Plus bad , or difficult Calculator applications to operate also.

Some Calculator applications when updated certain features stoped working correctly. Plus some had no developer support when purchased.

Hats off to the software developer for this simple to use, but powerful Calculator application.

PLEASE FIX THIS...,,,,,!!!! ,

Sound quirk

The sound should be based on the ringer volume instead of the volume. This isn't a video game application.

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, for example, based on the features you use or your age. Learn More


  • 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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