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.PCalc Lite is a fully functional and free taste of our very popular scientific calculator. It includes an optional RPN mode, multiple undo and redo, unit conversions and constants, as well as two stylish themes and our highly praised design. A great choice for your new iPad!

If you like what you see, the full version has many more settings and themes, a paper tape, engineering and scientific notation, and full support for hexadecimal, octal, and binary calculations. You can also now purchase extra features directly from inside PCalc Lite. Buy them individually, or buy everything.

Includes an Apple Watch app, so you can calculate on your wrist!

What’s New

Version 3.8.8

Fixed a problem installing the watchOS app on Series 4 watches paired with an iPhone 6 Plus.

Ratings and Reviews

4.6 out of 5
52 Ratings
52 Ratings
Industrial Emgineer ,

How To Do It-No Ads!

Now this is how you do it: offer a “light” intro version. Unlike most other calculator intro apps - no ads😃 Hat’s off to the developer for not insulting his user audience with obnoxious ads. This also appears to be a fine calculator app with the RPN option. Think I’ll upgrade.

dx27s ,

Too many updates!

This is a calculator app. Why does it need to be updated every week?

Developer Response ,

Apologies if the number of updates is causing you any problems!
We always do our best to keep PCalc updated with the latest Apple technology and sometimes there a bugs that creep in and need to be fixed. One reason we had more updates recently was that we were working with Apple to fix a problem that stopped users with an iPhone 6 Plus and Apple Watch Series 4 from installing the watch OS app. Looks like that's finally fixed now, so we don't anticipate any updates while we go and have a break over the holidays.
If you want to see details of what exactly is in each update, we do go into some detail on the What's New section of the App Store listing for each version.

StupidDroid ,

The best free calculator

This is the only simple, free calculator I've seen on the App Store. It doesn't have aggressive ads, and it has all the features I need. The only calculator app I'll ever use.


TLA Systems Ltd.
99.6 MB
Requires iOS 9.0 or later. Compatible with iPhone, iPad, and iPod touch.
Age Rating
Rated 4+
© 1992 - 2018 James Thomson
In-App Purchases
  1. Conversion Pack $0.99
  2. Complete Pack $9.99
  3. Multiple Line Pack $0.99


  • Game Center

    Challenge friends and check leaderboards and achievements.

  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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