This page is the one to watch for all the latest news and information about PCalc for the iPad, iPhone, and Apple Watch. Follow me as @jamesthomson on Twitter or read my developer blog for more.

21st July 2018

Just a small update to fix a bug with operator precedence and powers.

If you are lucky, you can also find the castle of the Panda King...

22nd May 2018

PCalc 3.7.6 is available here.


I'm whatever Gotham needs me to be.

This is a small update, but it adds a new dark theme, support for grads in trig functions, and display of SI unit prefixes in Engineering mode, amongst other things. So maybe it's not that small after all!

The full list of changes is here.

Let me know what you think at @jamesthomson or send me an email.

30th March 2018

PCalc 3.7.5 is available here. It's a minor update, but adds some new display options, many more of the themes support setting a tint colour, and there's now music in the About screen! What more do you need?

Let me know what you think at @jamesthomson or send me an email.

9th February 2018

PCalc 3.7.4 is available here. It's a small update that fixes a problem updating the currency conversion rates.

Older versions will no longer see updated rates because the European Central Bank added a new currency (the Icelandic Króna) to their rates file and, due to a bug on my part, it caused these old versions to crash after they downloaded it.

Rather than crash, I stopped them updating their rates. This new version will work fine however, and should work with any currencies that are added in the future.

Let me know what you think at @jamesthomson or send me an email.

17th November 2017

PCalc 3.7.3 is available here.

This release is mainly to improve the iPhone X support a little bit more, now that I have a device of my own to test with.

I'm working on some iPhone X specific features now, like an OLED black theme - in the meantime, the Samurai Night theme works pretty well.

Let me know what you think!

31st October 2017

PCalc 3.7.2 is available here.

This improves the iPhone X support, and also adds achievements and leaderboards to the About screen.

Let me know what you think!

13th October 2017

PCalc 3.7.1 is available here.

This is a small bug fix release to correct a few problems on iOS 11, but there's also a "Level 2" in the About screen. Look for the golden banana!

The full list of changes is here.

Let me know what you think!

15th September 2017

PCalc 3.7 is available here.


Mother of Drag-Ons

This release adds full support for iOS 11, including drag and drop support, and a (quite silly) AR calculator mode. It even supports the iPhone X!

The full list of changes is here.

Let me know what you think!

29th June 2017

PCalc 3.6.8 is available here.

Manual labour.

The main new feature is one that you can get right here! It's a manual, finally appearing after twenty-five years. It's written by Glenn Fleishman, and is a general introduction to the app, along with a list of every button and setting and what they do.

You can download a copy as a PDF here, which is better for printing and reading on large screens, and as an EPUB here which is better for smaller screens like a phone.

Let me know what you think!

13th June 2017

PCalc 3.6.7 is available here.

You've got the power to know. You're indestructible.

It's mainly just a small bug fix release for a display problem on the new 10.5-inch iPad Pro, although there are some new icons in there as well, naturally!

Let me know what you think!

2nd June 2017

PCalc 3.6.6 is available here.

How much more rainbow could it be?

I wanted to get a fix out for a problem with the tip jar total not syncing to other devices, but while I was at it I added some more icons! The tip jar seems to be a popular feature, so thank you everybody who has tipped - it's appreciated. Oh, and there's a silly "Gravity Mode" feature in the Advanced section of the settings.

It's the week before WWDC, so I wanted to get all this out of my system before I settle down into the long months of supporting whatever it is that gets announced on Monday.

Get in touch if you have any ideas for new features, or even just new icons!

25th May 2017

There was a small 3.6.5 update for PCalc Lite to fix a problem with the alternate icon resetting.

24th May 2017

PCalc 3.6.4 is available here.

An iconic release!

In this release I've added the ability to change the icon, and possibly gone a bit overboard as well! Along with the ability to change the icon between the existing blue and orange versions, there are nineteen more icons to choose from including lots of colors and some old designs going way back to 1992. I even redrew the old 2008 icons from scratch!

Now, to unlock these extra icons, I've added an optional tip jar. Since we've never charged for an update, this is an experiment to see if people feel like dropping some extra coins into the jar as a way of supporting the release of new versions. Even if you don't tip, you'll always have the full functionality available, this is just a little cosmetic bonus.

If the icon doesn't change on the homescreen, restart your device and that will fix it - there seems to be an iOS bug that causes the icons get stuck occasionally.

The full list of changes is here.

Let me know what you think. Do you love the tip jar idea, do you hate it? All comments and suggestions welcome.



27th January 2017

PCalc 3.6.3 is available here.

This release adds a number of small but useful functions. You can now optionally display labels on buttons to show the 2nd function for that button - it's in the Advanced section of the settings. And you can also now export all settings and user data from PCalc into a single file, send that to another device or to somebody else, and import everything again into a different copy. Works between PCalc and PCalc Lite too.

In PCalc Lite, instead of offering an "Upgrade Pack" in-app purchase, it now lets you buy the full version of the app directly. All other in-app purchases are unchanged, and the "Upgrade Pack" still works exactly as before if already purchased, giving identical functionality to the full app. But hopefully this should reduce confusion with people expecting the icon and name to change.

The full list of changes is here.

Let me know what you think! All comments and suggestions welcome.

3rd October 2016

PCalc 3.6.2 is available here.

Turns out, people are very particular about their rounding algorithms! So, by popular demand, the default is now back to "round to nearest or even" but I've added a new rounding part to the Advanced section of the settings, where you can pick the method you like. This applies to the main display and anywhere else in the app where rounding occurs because of the "number of decimal places" slider, not just to the "Round" button.

I've also fixed a bug in the fraction display mode on 32-bit devices.

24th September 2016

PCalc 3.6.1 is available here.

This is mostly to fix a crash with the widget on the iPhone 7 Plus - see my twitter feed for much discussion as I tried to work out what was going wrong. But, it also gave me a chance to add support for the new haptic feedback API on the new phones too. The full list of changes is here.

Every time I do an update like this, it starts out with no reviews, so if you like this update I'd appreciate it if you added or updated one yourself. Thanks, it makes a big difference to sales!

12th September 2016

PCalc 3.6 is now available here.



Fractionally improved...

This release adds full support for iOS 10 and watchOS 3, including a brand new widget and an updated watch app. Highlights include:

  • New look widget on iOS 10, including a mini calculator when you 3D Touch the PCalc icon.
  • A new "Fraction" display mode that shows the closest fraction for the current decimal result.
  • The ability to lock the calculator orientation in either portrait or landscape.
  • Much better handling of splitscreen on an iPad.
  • Improved key clicks with stereophonic sound!
  • Added support for game controllers. Yes, really.

The Apple Watch app has a new constants section, improved dictation, and support for gestures and Scribble on watchOS 3.



The full list of changes is here.

New versions are also available for macOS Sierra, and tvOS 10.

Hope you like this update. Get in touch at @jamesthomson or send me an email!

18th March 2016

PCalc 3.5.3 is now available here.





The first thing you'll notice are the new icons, designed by Frank at I've unified the design of all the icons across all the different platforms PCalc runs on. The old icons were gettng a bit tired and didn't fit in as well with the OS, especially on the Mac, and these are modern and easily recognisable.

The Apple Watch app gains a new unit conversion section, as well as a watch face complication to make it easier to access the app.

This release also brings a number of fixes and improvements, like the ability to specify E notation for the main display rather than using superscript numbers, and it makes the behaviour of the delete key more sensible when you are dealing with decimals and exponents.

The full list of changes is here. Hope you like this update!

Love or hate the new icons, let me know what you think at @jamesthomson or send me an email!

30th October 2015

PCalc is now available for the Apple TV!

They said it couldn't be done. They said it shouldn't be done. But I went and did it anyway!

Yes, it's PCalc for the Apple TV. It's optimised for use with a remote and has many of the features from the parent iOS and Mac apps including an optional RPN mode, multiple layouts and themes, and full speech support.

It's currently only $1.99 in the US - the price varies in other countries, but similarly low. It doesn't have every feature yet - no tape or unit conversions for example - so I've priced it appropriately for now and I may increase the price as more things get added. I had consider making it a Universal Purchase with the main iOS app, but because you can upgrade PCalc through an in-app purchase in the free PCalc Lite as well, that would have excluded those people from getting hold of it.

So, the fairest thing to everybody - and fair to me, the developer, as well - is that I've made it a standalone app.

To buy a copy, just search on the Apple TV for "pcalc" - select the icon that appears and it will take you directly to the App Store page.


Let me know what you think and what you'd like to see added next - I'm always open to feedback and feature requests!

8th October 2015

PCalc 3.5.2 is now available here.

This is a small update with one big feature! I've added 3D Touch support to PCalc, for the new iPhone 6S and 6S+. After you've run it once, you'll see a new shortcut menu when you press on the PCalc icon. You can also press on the display to quickly peek at either the registers, RPN stack, or the tape.

There's a very extensive 3D Touch configuation section in the settings now too. And no, that's not the new long iPhone 7, I just stitched together some screenshots!

I think that's all the main stuff I need to do for iOS 9 and the new phones, sorry it took me three releases, but it's been a bit crazy here, and the 3D Touch was a bit of a last minute surprise as well. Hope you like the combined 3.5.x release anyway! I'd appreciate it if you added a review for 3.5.2, since this update just hid all the good reviews for the previous versions - it's a big help if people see positive reviews when they go to buy a copy. Thanks in advance!

Let me know what you think of it too - always open to feedback and feature requests!

30th September 2015

Just a little bit of cross promotion - PCalc 4.3 for the Mac is now available here. This adds support for El Capitan, adds a bunch of features, and also brings the code up-to-date with version 3.5.1 for iOS.

I'm also currently working on a small iOS update to add 3D Touch support for the iPhone 6S and 6S+. I should have something to share very soon!

24th September 2015

PCalc 3.5.1 for iOS 9 and watchOS 2 is now available here.

I wanted to get a quick release out to fix a number of annoying bugs that slipped into 3.5, but there are some nice new features available too!

The watch app has had a bit of a lick of paint, and now features subtle haptic feedback when you press the buttons - I think it's really cool, and lets you know that you that it accepted your tap.

I've also collected together all the existing accessibility options, together with some new ones, and created a new "Accessibility" section in the settings. There are lots of options for bigger text, switching off animations, and spoken feedback. I've made all of these options available in PCalc Lite for the first time too, for free. I felt bad that I was inadventently charging for accessibility options by the fact of hiding them in the Advanced settings (which weren't available in Lite unless you bought the "Power User Pack" in-app purchase). So, I've done something about it!

Incidentally, the "Programmer Pack" was accidentally left switched on by default in PCalc Lite 3.5 but this has now been fixed - hope you enjoyed the free taste!

To quote myself of ten days ago, I hope you enjoy this release - as always updated reviews on the App Store, and anything else to help get the word out, are appreciated. Please let me know what you think.

14th September 2015

PCalc 3.5 for iOS 9 and watchOS 2 is now available here.


This release adds full support for the split-screen multitasking of iOS9. There's a completely new set of layouts available in split screen mode, optimised for a tall, thin column. But of course, you can edit them as well as create your own.

It also brings a native watchOS 2 app. In addition to the speed and responsiveness from an app that runs solely on the watch itself, there is now support for Handoff for sending a calculation directly from your watch to your Mac or to any other iOS device. The tip calculator has also been updated so you can use the digital crown to directly enter values, with the bonus that there's now room to show the full tip, split, and total all at once.

Due to popular demand, I've also changed the behaviour of the percentage key in algebraic mode to match the Apple calculator - but the old behaviour is still available via the "Display Percentage Result" option in the Advanced settings.

The full list of changes is here. Oh, and the main PCalc app still supports iOS 7 or later, but the watch app now requires a minimum of watchOS 2.

I hope you enjoy this release - as always updated reviews on the App Store, and anything else to help get the word out, are appreciated. Please let me know what you think!

Next stop, the Mac version of 4.3, and perhaps the new Apple TV!

10th June 2015

PCalc 3.4.1 is available here.

This is just a small update, but it adds a very powerful feature to the watch app. You can now dictate numbers and simple calculations - just tap the display and talk! As a bonus, you can also paste the same kinds of calculations into the main app.

If you like it, it would be great if you could write a review on the app store - or update an existing one. Thanks very much!

19th May 2015

PCalc 3.4 has been released, with support for the Apple Watch! It's available here.

This update gives you a fully functional calculator on your wrist, complete with a tip calculator. Tap the blue "…" button to switch between the pages.

Force touch brings up a menu that lets you send the current calculation direct to your phone, clear everything, or perform undo and redo. There's also a glance which will show you the most recent results from the phone and the watch.

Of course, there's also support for RPN calculations - the watch will pick up your preferred settings from PCalc on the phone automatically.

If you like it, it would be very helpful if you could add or update a review on the store for this release. In any case, please let me know what you think, and thanks!

Older news is here.