# PCalc — The Best Calculator

> Feature-rich calculator for scientific, engineering, and programming tasks. (iPhone/iPad app by TLA Systems Ltd..)

- Source: https://appshunter.io/ios/app/pcalc/id284666222 (this page in markdown: same URL + `.md`)
- Developer: [TLA Systems Ltd.](https://appshunter.io/developer/284666225)
- Category: Utilities, Business
- Price: $9.99 with in-app purchases
- Rating: 4.70/5 from 770 App Store ratings · 483 written reviews indexed
- Age rating: 4+
- Requires: iOS 15.0 · 81 MB
- Languages: American English
- Released: 2019-02-08
- Data updated: 2026-08-26
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/pcalc/id284666222/reviews.md

## What is PCalc?

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!

## Key features

- Optional RPN mode
- Multi-line display
- Extensive unit conversions
- Paper tape
- Multiple undo/redo
- Hexadecimal, octal, binary support
- Apple Watch app

## Pricing and in-app purchases

Base price: $9.99.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Small Tip | $0.99 | one-time |
| Medium Tip | $1.99 | one-time |
| Large Tip | $4.99 | one-time |
| Enormous Tip | $9.99 | one-time |


## Recent user reviews (10 of 483)

All indexed reviews: https://appshunter.io/ios/app/pcalc/id284666222/reviews.md

### 1/5 — Too hard to read

*2026-05-02, version 3.14.4*

PCalc is powerful, but the UI is a mess. Themes are bright and distracting, and there’s no way to get simple high-contrast text across the keypad, tape, and buttons. Fix one area and another becomes unreadable. Basic readability shouldn’t be this hard.

### 5/5 — The best calculator app

*2026-04-13, version 3.14.4*

I was looking for a calculator with support for RPN and conversions. This one checked boxes I didn’t even know I had! Amazing customizable interface that’s quick to learn, lots of options, and endless conversions and useful functions. An example of how to make a powerful app that works excellently on an iPhone.

### 5/5 — 👑

*2026-03-15, version 3.14.4*

This is the crown jewel, stop looking.

### 5/5 — Keeps getting BETTER. Best!

*2026-03-14, version 3.14.4*

Used for years. Reliable. Simple understandable display. And year after year keeps adding _useful_ features. Latest is woodworking fractions.  THANK YOU

### 5/5 — Outstanding App

*2025-11-04, version 3.14.3*

Thanks for all the hard work.

### 5/5 — Need a calculator with more features? Look no further.

*2025-10-29, version 3.14.3*

This is the pinnacle of Calculator apps on iOS. The only way could be better is if I could play games on it, like I did on my old Ti-85 in high school 😉 (check out “About by PCalc“ for some delightful surprises)

I’ve customized my calculator layouts very nicely, though I do wish I could more easily synchronize those (and other settings) between iOS and Mac versions. 

Bottom line: 
If you ever wished the built-in Calculator app could do a bit more… Or even a lot more, then get PCalc!

### 5/5 — Consistently great well maintained

*2025-10-11, version 3.14.2*

Used an my only RPN calculator for many years. Nice interface, extensible and well maintained.

### 5/5 — The best

*2025-09-30, version 3.14.2*

Look no further for the most functional calculator on your device. Great job.

### 5/5 — ❤️

*2025-09-29, version 3.14.2*

Best calculator app period.

### 4/5 — iOS26

*2025-09-28, version 3.14.2*

After updating to iOS26, the X Register no longer appears under the Apple Watch icon.
↓
‘25.9.29
It's fixed! Thanks!!

## Frequently asked questions about PCalc

### What does PCalc do?

PCalc is a powerful calculator application designed for users who need advanced functionality. It caters to scientists, engineers, students, and programmers with features like RPN mode, a multi-line display, and support for various number systems.

### What are the key features of PCalc?

Key features include an optional RPN mode, a multi-line display, a choice of button layouts, an extensive set of unit conversions and constants, a paper tape, multiple undo and redo capabilities, engineering and scientific notation, and support for hexadecimal, octal, and binary calculations. It also includes an Apple Watch app.

### Is PCalc free to use?

The application is free to download and use, with in-app purchases available. This allows users to access additional features or customization options beyond the core functionality.

### What kind of calculations can PCalc perform?

PCalc can perform a wide range of calculations, including standard arithmetic, scientific and engineering notation, hexadecimal, octal, and binary calculations. It also offers extensive unit conversions and constants, making it suitable for complex tasks.

## Version history (last 5 releases)

### 3.14.4 — 2026-03-12

Added an option to use woodworking fractions, in the Advanced settings.
Added an option to use the Indian numbering system for thousands separators, in the Advanced settings.
Added an option to ignore trailing operators, on by default, in the Advanced settings.
Added an option to automatically press Equals before "M+" and "M in" operations, on by default, in the Advanced settings.
Added an option to allow all themes for dark or light mode, in the Theme settings.
Added an option to hide any gloss effects on the display, in the Theme settings.
Added "Flow Rate", "Jewelry", and "Typography" sections to the conversions.
Added "norm", "sci", "eng", "acc", "frac", "nCr", "nPr", and "tau" buttons to the layout editor.
Added "tau" to the constants, and as a 2nd function of "pi" in most layouts.
Improved the layout editor with all the commands and keyboard shortcuts from the macOS version.
The "Clear on Open" option will now only trigger if you haven't used PCalc in the last five minutes.
You can now use combinations and permutations in user functions and conversions.
You can now edit buttons to display any SF Symbol as an image.
Now show a preview image when picking an SF Symbol.
Menus are more consistent with the macOS version.
The user interface mode setting is now independent of the theme mode setting.
Fixed a problem speaking negative numbers.
Fixed a problem displaying overflows.
Fixed a problem with the user interface dark mode settings.

### 3.14.3 — 2025-10-24

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.

### 3.14.2 — 2025-09-28

Improved support for iOS 26, iPadOS 26, and watchOS 26.
Added some icons that are always light or dark, regardless of system setting.
Added dark and tinted variants for the "2016 Earth-2" icon.
The "Chalk" and "Wood" icons have come back, due to popular demand.
Fixed a problem with the tape sidebar not appearing.
Fixed a problem with button text being too small or too big.

### 3.14.1 — 2025-09-19

Improved support for iOS 26, iPadOS 26, and watchOS 26.
The "Circuit" icon has come back, due to popular demand.
Added a Control Center button to quickly launch the app on watchOS 26 and later.
Now copy the old tint color from the "Dark Night" theme to "Dathomir" by default.
Fixed a problem forgetting the chosen layout.
Fixed a problem with the "Dathomir" theme in RPN mode.
Fixed a problem always resetting the dark theme to "Dathomir".
Fixed a problem with the "New Calculator" button getting truncated.

### 3.14 — 2025-09-12

Added support for iOS 26, including dark and tinted icons.
Added support for iPadOS 26, including resizable windows and a full menu bar.
Added support for watchOS 26, including the latest watches and new complications.
Added a Control Center button to quickly launch the app on iOS 18 and later.
Added a new default dark mode theme, "Dathomir".
Added an "exp" button to the Apple Watch app.
Updated the scientific constants to include the latest CODATA 2022 values.
Most keyboard shortcuts from the Mac version now work on iOS / iPadOS 26.
Fixed various bugs.
PCalc for the Apple Watch now requires watchOS 9 or later.
PCalc now requires iOS / iPadOS 15 or later.
Apple removed all the old-style widgets in iOS 18, so PCalc's widget is currently unavailable.

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## More apps by TLA Systems Ltd.

- [PCalc Lite](https://appshunter.io/ios/app/pcalc-lite/id300311831)
- [PCalc TV](https://appshunter.io/ios/app/pcalc-tv/id1052173825)
- [Dice by PCalc](https://appshunter.io/ios/app/dice-by-pcalc/id1468680083)
- [About by PCalc](https://appshunter.io/ios/app/about-by-pcalc/id1613982997)

All apps by TLA Systems Ltd.: https://appshunter.io/developer/284666225

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-26.*