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PCalc Lite

PCalc Lite

The Best Calculator

214 ratings
507 reviews
📚 Education
🔧 Utilities
Free
In-App Purchases

Details

  • Released
  • Updated
  • December 19, 2008
  • March 12, 2026

Features

Developer

TLA Systems Ltd.
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PCalc Lite screenshot #1 for iPhone
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PCalc Lite screenshot #5 for iPhone
iphone
ipad
🧾$0.99 - $9.99
In-App Purchase↘︎
📌Ready
Reviews summary↘︎
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❓5 answered
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About

This free scientific calculator offers essential features like RPN mode, unit conversions, and multiple undo/redo. It provides a taste of a more powerful version, with optional in-app purchases for expanded functionality.

✓Optional RPN mode
✓Multiple undo and redo
✓Unit conversions and constants
✓Two stylish themes
✓Apple Watch app
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What users say

Summarized from real user reviews of PCalc Lite. Based on 214 reviews and a 4.4/5 average, it highlights the 6 positives and 5 negatives reviewers mention most about this Utilities app.

Positive things

  • 🚀Fast and responsive
  • 👍Clean and intuitive interface
  • 💡Customizable themes and settings
  • 🚀Efficient performance
  • 👍Useful conversion tools
  • 👍Excellent Apple Watch support

Negative things

  • 🐛Occasional lags and crashes
  • 🔒Lack of dark mode support
  • 🔒Inconsistent icon appearance after upgrades
  • 🔒Limitations in RPN mode on Apple Watch
  • 🔒Lack of financial calculator functions
See all reviews

What's New in PCalc Lite

3.14.4

March 12, 2026

Menus are more consistent with the macOS version. Fixed a problem speaking negative numbers. Fixed a problem displaying overflows. With the "Power User Pack" installed: 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. The "Clear on Open" option will now only trigger if you haven't used PCalc in the last five minutes. With the "Theme Pack" installed: 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. The user interface mode setting is now independent of the theme mode setting. Fixed a problem with the user interface dark mode settings. With the "Conversion Pack" installed: Added "Flow Rate", "Jewelry", and "Typography" sections to the conversions. Added "tau" to the constants. You can now use combinations and permutations in user functions and conversions. Now show a preview image when picking an SF Symbol. With the "Engineer Pack" or "Programmer Pack" installed: Added "norm", "sci", "eng", "acc", "frac", "nCr", "nPr", and "tau" buttons to the layout editor. Added "tau" as a 2nd function of "pi" in most layouts. Improved the layout editor with all the commands and keyboard shortcuts from the macOS version. You can now edit buttons to display any SF Symbol as an image.

More
11

In-App Purchases

$0.99

Theme Pack

Adds seven new calculator themes, as well as additional digit styles and click sounds. PCalc has never looked better!

User reviews

Most RecentHighest RatedLowest Rated

Feature request: Widget

There used to be a widget but Apple removed the legacy widgets. Please have an interactive widget calc that would be fire
jfresh330jfresh330

Eher ein Scherzrechner (42) hat aber sei Jahren keine % Taste

Ich verstehe nicht, wie man einen derart ausbaufähigen Taschenrechner anbieten kann mit unzähligen Funktionrn, Layoutmöglichkeiten usw. Jedoch wird keine %-Taste abgebildet. Sorry Bro, das disqualifiziert diesen Rechner für mich. Absolut unverständlich, das so grundlegende Dinge fehlen. Wer’s denn unbedingt braucht, muss die Taste selber definieren bzw. eine andere ersetzen und die Funktion selber hinterlegen. Ich bin kein (Mathe-) Nerd. Und habe auch keine Zeit darin umständlich rumzufummeln.

Ich fordere den Macher auf, diese grundlegende Funktion nach Jahrzehnten ENDLICH NACHZULIEFERN.

Einfach unfassbar.
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NightgengaNightgenga

Widget STILL doesn't work on iOS 26

Just noticed that the Dev has replied to my previous review. Thanks Apple for not sending me a notification!

I’ve noticed the same issue with many other calculator widgets in that the numbers need to be typed really slow, else a number or two could be skipped. It’s really annoying! I’d happily make a one time payment if I can just get a working widget like it was before.
————————————————

The widget worked perfectly until the iOS 18 update. Now it wouldn't come up to choose in the widgets section. Without the widget, I have no use for this app as the native iPhone calculator app works just fine. Hope the developers will update it for iOS 18.
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PeaceJoyTranquilityPeaceJoyTranquility

Виджет

Почему не работает виджет на Айфоне?( Исправьте пожалуйста
SHEIH7SHEIH7

Editing button layout

Please allow us to use an icon either an image or an SF Symbol on a button pleaseeeee
jfresh330jfresh330
See 502 more reviews

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User experience

🐞

Reported Bugs

3 issues

Calculations sometimes produce unexpected results

Bug

Upside-down text censorship feature is problematic

Bug

Purchased features not always accessible on Apple Watch

Bug
✨

Requested Features

4 requests

Add option to display thousands separators

Feature

Implement a history function to review past calculations

Feature

Provide more customization options for the widget

Feature

Add support for sexagesimal angle input and conversion

Feature

FAQ

What does PCalc Lite do?

PCalc Lite is a free scientific calculator that offers core functionalities such as an optional RPN mode, multiple undo and redo capabilities, and a comprehensive set of unit conversions and constants. It serves as a free introduction to the more advanced features found in the full version of the app.

What are the key features of PCalc Lite?

Key features include an optional RPN mode for advanced users, multiple undo and redo functions for easy error correction, and a wide range of unit conversions and constants. It also comes with two stylish themes and an Apple Watch app for on-the-go calculations.

Is PCalc Lite free to use?

PCalc Lite is free to download and use, offering a substantial set of features. For users who require even more advanced capabilities, such as engineering and scientific notation, hexadecimal, octal, and binary calculations, or a paper tape, additional features can be purchased individually or as a bundle through in-app purchases.

What devices is PCalc Lite compatible with?

PCalc Lite is designed for iPad and also includes an Apple Watch app, allowing you to perform calculations directly on your wrist. The description specifically mentions it as a great choice for your new iPad.

Who would benefit from using PCalc Lite?

This app is ideal for anyone who needs a powerful and versatile calculator, including scientists, engineers, students, programmers, and individuals who appreciate a feature-rich tool. The optional RPN mode and extensive unit conversions make it particularly useful for technical and academic fields.