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James Thomson

@jamesthomson@mastodon.social
mastodon 4.6.0-nightly.2026-03-16

Indie iOS / Mac developer from Glasgow, Scotland. Maker of the PCalc scientific calculator, and a cool dice app. Occasional writer, conference speaker, D&D player, and podcast pundit.

0 Followers
0 Following
Joined December 12, 2016
My Apps:
https://pcalc.com
My Tech Podcasts:
http://relay.fm/people/jamesthomson
My Pop Culture Podcasts:
https://www.theincomparable.com/person/james-thomson
My Squirrels:
https://www.instagram.com/stresspanda/

Posts

jamesthomson
James Thomson
@jamesthomson@mastodon.social

Indie iOS / Mac developer from Glasgow, Scotland. Maker of the PCalc scientific calculator, and a cool dice app. Occasional writer, conference speaker, D&D player, and podcast pundit.

mastodon.social
James Thomson
James Thomson
@jamesthomson@mastodon.social

Indie iOS / Mac developer from Glasgow, Scotland. Maker of the PCalc scientific calculator, and a cool dice app. Occasional writer, conference speaker, D&D player, and podcast pundit.

mastodon.social
@jamesthomson@mastodon.social · 2d ago

Once again, Pi Day rolls around, and once again I forget to actually do anything substantial to promote PCalc.

Even worse, I added Tau in the latest releases, and the Pi people and the Tau people have been at war for decades. Don't ask…

But the current iOS version is 3.14.x and so Pi wins for today!

https://pcalc.com

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jamesthomson
James Thomson
@jamesthomson@mastodon.social

Indie iOS / Mac developer from Glasgow, Scotland. Maker of the PCalc scientific calculator, and a cool dice app. Occasional writer, conference speaker, D&D player, and podcast pundit.

mastodon.social
James Thomson
James Thomson
@jamesthomson@mastodon.social

Indie iOS / Mac developer from Glasgow, Scotland. Maker of the PCalc scientific calculator, and a cool dice app. Occasional writer, conference speaker, D&D player, and podcast pundit.

mastodon.social
@jamesthomson@mastodon.social · 4d ago

Some updates to my PCalc scientific calculator!

Consider this the "new features that should have shipped last year" release. Includes some frequently requested things like woodworking fractions, support for the Indian numbering system for separators, and three new conversion categories, "Flow Rate", "Jewelry", and "Typography".

I've also tried to unify a lot of features that were only on iOS, or only on the Mac.

Mac:
https://pcalc.com/store/pcalcmac

Everything else:
https://pcalc.com/store/pcalc

Enjoy!

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jamesthomson
James Thomson
@jamesthomson@mastodon.social

Indie iOS / Mac developer from Glasgow, Scotland. Maker of the PCalc scientific calculator, and a cool dice app. Occasional writer, conference speaker, D&D player, and podcast pundit.

mastodon.social
James Thomson
James Thomson
@jamesthomson@mastodon.social

Indie iOS / Mac developer from Glasgow, Scotland. Maker of the PCalc scientific calculator, and a cool dice app. Occasional writer, conference speaker, D&D player, and podcast pundit.

mastodon.social
@jamesthomson@mastodon.social · 5d ago

So many apps waiting for review!

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jamesthomson
James Thomson
@jamesthomson@mastodon.social

Indie iOS / Mac developer from Glasgow, Scotland. Maker of the PCalc scientific calculator, and a cool dice app. Occasional writer, conference speaker, D&D player, and podcast pundit.

mastodon.social
James Thomson
James Thomson
@jamesthomson@mastodon.social

Indie iOS / Mac developer from Glasgow, Scotland. Maker of the PCalc scientific calculator, and a cool dice app. Occasional writer, conference speaker, D&D player, and podcast pundit.

mastodon.social
@jamesthomson@mastodon.social · 5d ago

It's still cold, but the sun is finally beginning to shine. What you really need in this confusing weather is a matching embroidered PCalc beanie and a t-shirt!

Some new products in the extensive PCalc and Dice by PCalc merch range are available now at http://pcalc.fun!

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Parent @agiletortoise@mastodon.social Open
@agiletortoise@mastodon.social
@jamesthomson@mastodon.social @Drwave@mastodon.social If you put an appetizing plate of food in front of them, most people won’t ask to look in the kitchen of the restaurant, and they will actively av
Current reply
jamesthomson
James Thomson
@jamesthomson@mastodon.social

Indie iOS / Mac developer from Glasgow, Scotland. Maker of the PCalc scientific calculator, and a cool dice app. Occasional writer, conference speaker, D&D player, and podcast pundit.

mastodon.social
James Thomson
James Thomson
@jamesthomson@mastodon.social

Indie iOS / Mac developer from Glasgow, Scotland. Maker of the PCalc scientific calculator, and a cool dice app. Occasional writer, conference speaker, D&D player, and podcast pundit.

mastodon.social
@jamesthomson@mastodon.social · Feb 16, 2026
@agiletortoise@mastodon.social @Drwave@mastodon.social This meat tastes suspiciously familiar.
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Boosted by Darby Lines @angry_drunk@union.place
jamesthomson
James Thomson
@jamesthomson@mastodon.social

Indie iOS / Mac developer from Glasgow, Scotland. Maker of the PCalc scientific calculator, and a cool dice app. Occasional writer, conference speaker, D&D player, and podcast pundit.

mastodon.social
James Thomson
James Thomson
@jamesthomson@mastodon.social

Indie iOS / Mac developer from Glasgow, Scotland. Maker of the PCalc scientific calculator, and a cool dice app. Occasional writer, conference speaker, D&D player, and podcast pundit.

mastodon.social
@jamesthomson@mastodon.social · Feb 16, 2026
Writers: Generative AI models were built on our stolen works, are deeply unethical, and risk devaluing our entire profession. Artists: Generative AI models were built on our stolen works, are deeply unethical, and risk devaluing our entire profession. Developers: Wheeeeeeeeee!
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jamesthomson
James Thomson
@jamesthomson@mastodon.social

Indie iOS / Mac developer from Glasgow, Scotland. Maker of the PCalc scientific calculator, and a cool dice app. Occasional writer, conference speaker, D&D player, and podcast pundit.

mastodon.social
James Thomson
James Thomson
@jamesthomson@mastodon.social

Indie iOS / Mac developer from Glasgow, Scotland. Maker of the PCalc scientific calculator, and a cool dice app. Occasional writer, conference speaker, D&D player, and podcast pundit.

mastodon.social
@jamesthomson@mastodon.social · Feb 11, 2026

I knew you could change the brightness of the iPhone torch from the Dynamic Island. I did _not_ know you could change the shape of the beam!

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Root @flargh@mastodon.social Open
@flargh@mastodon.social
Not a power pellet #retrogaming
Ancestor 2 @jamesthomson@mastodon.social Open
@jamesthomson@mastodon.social
@flargh@mastodon.social Was this written by four ghosts?
Parent @flargh@mastodon.social Open
@flargh@mastodon.social
@jamesthomson@mastodon.social then it would say DO NOT EAT US
Current reply
jamesthomson
James Thomson
@jamesthomson@mastodon.social

Indie iOS / Mac developer from Glasgow, Scotland. Maker of the PCalc scientific calculator, and a cool dice app. Occasional writer, conference speaker, D&D player, and podcast pundit.

mastodon.social
James Thomson
James Thomson
@jamesthomson@mastodon.social

Indie iOS / Mac developer from Glasgow, Scotland. Maker of the PCalc scientific calculator, and a cool dice app. Occasional writer, conference speaker, D&D player, and podcast pundit.

mastodon.social
@jamesthomson@mastodon.social · Jan 22, 2026
@flargh@mastodon.social I am going to call people “oxygen absorbers” though.
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@flargh@mastodon.social
Not a power pellet #retrogaming
Current reply
jamesthomson
James Thomson
@jamesthomson@mastodon.social

Indie iOS / Mac developer from Glasgow, Scotland. Maker of the PCalc scientific calculator, and a cool dice app. Occasional writer, conference speaker, D&D player, and podcast pundit.

mastodon.social
James Thomson
James Thomson
@jamesthomson@mastodon.social

Indie iOS / Mac developer from Glasgow, Scotland. Maker of the PCalc scientific calculator, and a cool dice app. Occasional writer, conference speaker, D&D player, and podcast pundit.

mastodon.social
@jamesthomson@mastodon.social · Jan 22, 2026
@flargh@mastodon.social Was this written by four ghosts?
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Root @fahrni@curmudgeon.cafe Open
@fahrni@curmudgeon.cafe
I saw a screenshot of an older Mac OS a few months back and I absolutely loved the design. Was there a version of Mac OS, based on the pre-OS X codebase, that never shipped? I wish we could move more
Ancestor 2 @jamesthomson@mastodon.social Open
@jamesthomson@mastodon.social
@fahrni@curmudgeon.cafe You are possibly thinking of the themes that never shipped with Mac OS 8.5, but were in the betas. “Hi-Tech” and “Gizmo”.
Parent @fahrni@curmudgeon.cafe Open
@fahrni@curmudgeon.cafe
@jamesthomson@mastodon.social James, thanks for the lead. I must have hallucinated the design I really liked because I cannot find it again. What I saw was a color version of Classic MacOS but the but
Current reply
jamesthomson
James Thomson
@jamesthomson@mastodon.social

Indie iOS / Mac developer from Glasgow, Scotland. Maker of the PCalc scientific calculator, and a cool dice app. Occasional writer, conference speaker, D&D player, and podcast pundit.

mastodon.social
James Thomson
James Thomson
@jamesthomson@mastodon.social

Indie iOS / Mac developer from Glasgow, Scotland. Maker of the PCalc scientific calculator, and a cool dice app. Occasional writer, conference speaker, D&D player, and podcast pundit.

mastodon.social
@jamesthomson@mastodon.social · Jan 12, 2026
@fahrni@curmudgeon.cafe In that case, I'm not sure. Even Mac OS X Server, the predecessor to Mac OS X which had the platinum interface, was pretty pixelated. Maybe a third party theme for Mac OS X?
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@fahrni@curmudgeon.cafe
I saw a screenshot of an older Mac OS a few months back and I absolutely loved the design. Was there a version of Mac OS, based on the pre-OS X codebase, that never shipped? I wish we could move more
Current reply
jamesthomson
James Thomson
@jamesthomson@mastodon.social

Indie iOS / Mac developer from Glasgow, Scotland. Maker of the PCalc scientific calculator, and a cool dice app. Occasional writer, conference speaker, D&D player, and podcast pundit.

mastodon.social
James Thomson
James Thomson
@jamesthomson@mastodon.social

Indie iOS / Mac developer from Glasgow, Scotland. Maker of the PCalc scientific calculator, and a cool dice app. Occasional writer, conference speaker, D&D player, and podcast pundit.

mastodon.social
@jamesthomson@mastodon.social · Jan 11, 2026
@fahrni@curmudgeon.cafe You are possibly thinking of the themes that never shipped with Mac OS 8.5, but were in the betas. “Hi-Tech” and “Gizmo”.
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@flargh@mastodon.social
My new year's resolution is 640 x 480 #retrocomputing
Current reply
jamesthomson
James Thomson
@jamesthomson@mastodon.social

Indie iOS / Mac developer from Glasgow, Scotland. Maker of the PCalc scientific calculator, and a cool dice app. Occasional writer, conference speaker, D&D player, and podcast pundit.

mastodon.social
James Thomson
James Thomson
@jamesthomson@mastodon.social

Indie iOS / Mac developer from Glasgow, Scotland. Maker of the PCalc scientific calculator, and a cool dice app. Occasional writer, conference speaker, D&D player, and podcast pundit.

mastodon.social
@jamesthomson@mastodon.social · Jan 05, 2026
@flargh@mastodon.social 160×200 should be enough for everybody!
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@gedeonm@mastodon.social
Here’s my #Feditree. Even if you didn’t make my tree I still love each and every one of you out there. Thanks to all those who find me interesting enough to follow and say hi from time to time. I’m gl
Current reply
jamesthomson
James Thomson
@jamesthomson@mastodon.social

Indie iOS / Mac developer from Glasgow, Scotland. Maker of the PCalc scientific calculator, and a cool dice app. Occasional writer, conference speaker, D&D player, and podcast pundit.

mastodon.social
James Thomson
James Thomson
@jamesthomson@mastodon.social

Indie iOS / Mac developer from Glasgow, Scotland. Maker of the PCalc scientific calculator, and a cool dice app. Occasional writer, conference speaker, D&D player, and podcast pundit.

mastodon.social
@jamesthomson@mastodon.social · Dec 24, 2025
@gedeonm@mastodon.social Always glad to be a bauble :) Have a good break there!
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@agiletortoise@mastodon.social
@jamesthomson@mastodon.social It hasn't been an easy year. I'm still beating back odd bugs.
Current reply
jamesthomson
James Thomson
@jamesthomson@mastodon.social

Indie iOS / Mac developer from Glasgow, Scotland. Maker of the PCalc scientific calculator, and a cool dice app. Occasional writer, conference speaker, D&D player, and podcast pundit.

mastodon.social
James Thomson
James Thomson
@jamesthomson@mastodon.social

Indie iOS / Mac developer from Glasgow, Scotland. Maker of the PCalc scientific calculator, and a cool dice app. Occasional writer, conference speaker, D&D player, and podcast pundit.

mastodon.social
@jamesthomson@mastodon.social · Dec 19, 2025
@agiletortoise@mastodon.social Definitely one of the hardest in memory - we're not getting any younger also!
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@gedeonm@mastodon.social
@jamesthomson@mastodon.social already done my friend.
Current reply
jamesthomson
James Thomson
@jamesthomson@mastodon.social

Indie iOS / Mac developer from Glasgow, Scotland. Maker of the PCalc scientific calculator, and a cool dice app. Occasional writer, conference speaker, D&D player, and podcast pundit.

mastodon.social
James Thomson
James Thomson
@jamesthomson@mastodon.social

Indie iOS / Mac developer from Glasgow, Scotland. Maker of the PCalc scientific calculator, and a cool dice app. Occasional writer, conference speaker, D&D player, and podcast pundit.

mastodon.social
@jamesthomson@mastodon.social · Dec 19, 2025
@gedeonm@mastodon.social Most appreciated! Hope you can have some downtime yourself.
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Boosted by Ged Maheux @gedeonm@mastodon.social
jamesthomson
James Thomson
@jamesthomson@mastodon.social

Indie iOS / Mac developer from Glasgow, Scotland. Maker of the PCalc scientific calculator, and a cool dice app. Occasional writer, conference speaker, D&D player, and podcast pundit.

mastodon.social
James Thomson
James Thomson
@jamesthomson@mastodon.social

Indie iOS / Mac developer from Glasgow, Scotland. Maker of the PCalc scientific calculator, and a cool dice app. Occasional writer, conference speaker, D&D player, and podcast pundit.

mastodon.social
@jamesthomson@mastodon.social · Dec 19, 2025
Dice by PCalc 2.9 is out now! My #ttrpg dice rolling app now fully supports all the 26 OS updates and has a shiny Liquid Glass redesign. I've also reworked the reroll function, so it remembers the starting state of the last dice roll, including advantage, disadvantage, and any dice functions. Exploding dice now work properly too, and actually explode! iOS: https://pcalc.com/store/dice Mac: https://pcalc.com/store/dicemac
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jamesthomson
James Thomson
@jamesthomson@mastodon.social

Indie iOS / Mac developer from Glasgow, Scotland. Maker of the PCalc scientific calculator, and a cool dice app. Occasional writer, conference speaker, D&D player, and podcast pundit.

mastodon.social
James Thomson
James Thomson
@jamesthomson@mastodon.social

Indie iOS / Mac developer from Glasgow, Scotland. Maker of the PCalc scientific calculator, and a cool dice app. Occasional writer, conference speaker, D&D player, and podcast pundit.

mastodon.social
@jamesthomson@mastodon.social · Dec 03, 2025

You spend years wanting more colour in Apple products, and then they run out of dye.

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Boosted by Craig Grannell @craiggrannell@mastodon.social
jamesthomson
James Thomson
@jamesthomson@mastodon.social

Indie iOS / Mac developer from Glasgow, Scotland. Maker of the PCalc scientific calculator, and a cool dice app. Occasional writer, conference speaker, D&D player, and podcast pundit.

mastodon.social
James Thomson
James Thomson
@jamesthomson@mastodon.social

Indie iOS / Mac developer from Glasgow, Scotland. Maker of the PCalc scientific calculator, and a cool dice app. Occasional writer, conference speaker, D&D player, and podcast pundit.

mastodon.social
@jamesthomson@mastodon.social · Nov 27, 2025
✨50% OFF BLACK FRIDAY SALE ✨ My scientific calculator PCalc, and my TTRPG dice rolling app Dice by PCalc, are both 50% off from now until the end of Monday! PCalc for iOS / watchOS / visionOS: https://pcalc.com/store/pcalc PCalc for macOS: https://pcalc.com/store/pcalcmac Dice for iOS / watchOS https://pcalc.com/store/dice Dice for macOS: https://pcalc.com/store/dicemac Reposts are always appreciated!
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jamesthomson
James Thomson
@jamesthomson@mastodon.social

Indie iOS / Mac developer from Glasgow, Scotland. Maker of the PCalc scientific calculator, and a cool dice app. Occasional writer, conference speaker, D&D player, and podcast pundit.

mastodon.social
James Thomson
James Thomson
@jamesthomson@mastodon.social

Indie iOS / Mac developer from Glasgow, Scotland. Maker of the PCalc scientific calculator, and a cool dice app. Occasional writer, conference speaker, D&D player, and podcast pundit.

mastodon.social
@jamesthomson@mastodon.social · Jun 09, 2025

It's called iOS 26 because it will take 26 months to explain to your parents how to use their phone again.

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jamesthomson
James Thomson
@jamesthomson@mastodon.social

Indie iOS / Mac developer from Glasgow, Scotland. Maker of the PCalc scientific calculator, and a cool dice app. Occasional writer, conference speaker, D&D player, and podcast pundit.

mastodon.social
James Thomson
James Thomson
@jamesthomson@mastodon.social

Indie iOS / Mac developer from Glasgow, Scotland. Maker of the PCalc scientific calculator, and a cool dice app. Occasional writer, conference speaker, D&D player, and podcast pundit.

mastodon.social
@jamesthomson@mastodon.social · Nov 29, 2024

I've mentioned it before, but I've been dealing with a serious family health thing this year, and I haven't really had the brain power to do much outside of that, hence the lack of updates. And, family comes first, I know.

But income this year has not been exactly stellar as a result, so I could do with a little holiday bonus. Any help in boosting my Black Friday sales is appreciated.

Is this emotional blackmail? Yes. Am I going to shamelessly do it anyway? Also yes.

@jamesthomson@mastodon.social

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