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 3.9.2

Fixed a problem with blank keys in the Apple Watch app when running on watchOS 4.
Fixed a problem with PCalc accessing the clipboard when running functions and conversions.

Ratings and Reviews

4.7 out of 5
39 Ratings

39 Ratings

Denny Tuckerman ,


I must say what an impressive piece of work this App is. I’m 69 now but I cut my programming teeth in the 70/80s on the HP-97 and HP-42S - this app exceeds their functionality, but in fairness to those Vintage calculators they were (and mine are still functioning ) running under 35+ years old technology.

Ayteeward ,

Lacking DMS parsing

A very pretty and competent calculator but as a land surveyor, I work extensively with Degrees Minutes Seconds and fractions of Seconds. I need to be able to input these as DMS and convert them to decimal degrees before applying trigonometric functions. The results of calculations often need to be converted back to DMS to obtain an angle or bearing.

Currently, this calculator doesn’t have this function (and its inverse) and is therefore a pain to use for this purpose.

Ethansml ,

Excellent Calculator

Excellent App with Excellent Support from developers. Easily a 5 Star App. The new update takes it to the next level and I shall purchase Macbook version in order to support development.


TLA Systems Ltd.
107 MB

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



Age Rating
Rated 4+
© 1992 - 2019 James Thomson
In-App Purchases
  1. Small Tip £0.99
  2. Medium Tip £1.99
  3. Large Tip £4.99


  • 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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