PCalc

Name: PCalc
Price: 14.99 AUD
Rating: 5 (51 reviews)
Author: TLA Systems Ltd.

The Best Calculator

$14.99 · In-App Purchases

51 Ratings
Ages

4+
Years
Category

Utilities
Developer

TLA Systems Ltd.
Language

EN
English
Size

85.1
MB

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!

Ratings & Reviews

5.0

out of 5

51 Ratings

Editors’ Choice

Filled with high-powered features and functions that will appeal to everyone. If you’re a fan of scientific notation, trigonometry or unit conversion, add this to your Home Screen!
Kilojoules calculation - Is it wrong?
12/09/2019

PaulnSans
When I enter the argument to convert 4.184 Kilojoules to Calories the returned answer is 1,000 calories. The answer I was looking for was 1.0 so have I misunderstood something here?UPDATE: Tim got back to me on this so I felt bad about putting this in here prior to sending my query over email. Glad I can come back in to revisit the review / question. The explanation taught me something new so I was very happy about the response - and the App answer turns out to be 100% correct (I was wrong!!) I gave this 5 stars prior to typing the question because the calculator is well worth the money. Top product and TOTALLY LOVE the Apple Watch App that is also a ‘Complication’ (which is why I got this in the first place). As an Australian Chartered Accountant - I totally RECOMMEND this app ESPECIALLY if you have an Apple Watch!!

Developer Response
Thanks for getting in touch. The calculation is correct but calories (abbreviation: cal) can be confusing. Often, especially in the context of food, people say calories when what they are really talking about are kilocalories (abbreviation: kcal). In my experience nutritional labels use kcal and kJ, but the writers of recipes sometimes tend towards that usage of Calories, which is also referred to as large calorie or food calorie (abbreviation: Cal). So 1,000 cal = 1 kcal = 1 Cal = 4.184 kJ. Unfortunately the capitalisation often gets lost, overlooked or is even dropped. For the sake of consistency PCalc sticks to cal (sometimes called small calorie) and kcal. Hope this helps.
Kilojoules calculation - Is it wrong?
12/09/2019

PaulnSans

When I enter the argument to convert 4.184 Kilojoules to Calories the returned answer is 1,000 calories. The answer I was looking for was 1.0 so have I misunderstood something here?UPDATE: Tim got back to me on this so I felt bad about putting this in here prior to sending my query over email. Glad I can come back in to revisit the review / question. The explanation taught me something new so I was very happy about the response - and the App answer turns out to be 100% correct (I was wrong!!) I gave this 5 stars prior to typing the question because the calculator is well worth the money. Top product and TOTALLY LOVE the Apple Watch App that is also a ‘Complication’ (which is why I got this in the first place). As an Australian Chartered Accountant - I totally RECOMMEND this app ESPECIALLY if you have an Apple Watch!!
Developer Response 03/09/2019
Thanks for getting in touch. The calculation is correct but calories (abbreviation: cal) can be confusing. Often, especially in the context of food, people say calories when what they are really talking about are kilocalories (abbreviation: kcal). In my experience nutritional labels use kcal and kJ, but the writers of recipes sometimes tend towards that usage of Calories, which is also referred to as large calorie or food calorie (abbreviation: Cal). So 1,000 cal = 1 kcal = 1 Cal = 4.184 kJ. Unfortunately the capitalisation often gets lost, overlooked or is even dropped. For the sake of consistency PCalc sticks to cal (sometimes called small calorie) and kcal. Hope this helps.
You know it’s good when...
23/12/2017

r10k
Not only is it a great calculator, but it has mfi gamepad support (probably for the Appletv version, but still... amazing) and you can change the app icon. That’s crazy. In fact, this app has so much customisation, at this point the only thing it can’t do is read minds and prepare a cup of coffee.I’ve put off buying this for years. Big mistake. It looks like I’ll be using it a lot!
You know it’s good when...
23/12/2017

r10k

Not only is it a great calculator, but it has mfi gamepad support (probably for the Appletv version, but still... amazing) and you can change the app icon. That’s crazy. In fact, this app has so much customisation, at this point the only thing it can’t do is read minds and prepare a cup of coffee.I’ve put off buying this for years. Big mistake. It looks like I’ll be using it a lot!
Excellent calculator but I wish it supported complex numbers
07/06/2023

Endyaust
I am very happy with this application and have used it extensively for years. I just wish it supported complex numbers like Free42 or Plus42. I appreciate however that adding that support would be a huge task so I understand why it has not happened.
Excellent calculator but I wish it supported complex numbers
07/06/2023

Endyaust

I am very happy with this application and have used it extensively for years. I just wish it supported complex numbers like Free42 or Plus42. I appreciate however that adding that support would be a huge task so I understand why it has not happened.

Improved support for iOS 26, iPadOS 26, and watchOS 26. Fixed a problem importing settings and other files on iPadOS 26. Fixed a problem with the editing toolbar on iOS / iPadOS 26. Fixed a crash when starting to edit a layout on iOS / iPadOS 26. Fixed a crash when starting to edit constants. Fixed a crash with certain custom tint colors.