Numerology: 17 Years in the App Store (Part 2)
Nov 03, 2025
This is part 2 of my blog series on the history of my app Numerology. See Part 1 here.
The First Version It was the very early 90’s. Steve Jobs was at NeXT. I had some model of Macintosh II running on a 680x0 processor. I also had a compiler for C with object-oriented extensions (basically a subset of C++), called THINK C, with a class library called TCL, or the Think Class Library.
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➦ Healthcare for the Self-Employed or Unemployed (and to preserve your sanity)
Oct 29, 2025
Problem Are you self-employed? Are you unemployed? Do you have to purchase your own health insurance?
Are you generally healthy, and rarely need a doctor? Are you into alternative health care, which health insurance never covers anyway?
Do you find “Affordable” health care, unaffordable like you see on healthcare.gov?
Do you find the whole process of finding the right plan and jumping through all the bureaucratic hoops frustrating?
I’m currently in this boat.
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➦ Numerology: 17 Years in the App Store (Part 1)
Oct 28, 2025
Introduction My app, Numerology, has been in the Apple app store for over 17 years. During that time, it and its variations (lite version, Mac version) have been downloaded over 188,000 times, and made almost $150,000 in profit.
Numerology Icon
It’s ran on just about every Apple iPhone, iPad, and Mac. Before the App Store, it even ran on classic macOS machines.
It’s been through technology changes such as moving from Think C to Objective-C to Swift; the Think Class Library to UIKit to SwiftUI; classic to modern macOS, 68K chips to PowerPC chips to Intel chips and then to Apple Silicon.
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➦ Case Study: Improving the Effeciency of Software Development Teams Dependent on Another Team
Jan 16, 2025
In my last job, I was on a platform team. One of the responsibilities of a platform team is to support all the other software development teams in an organization by writing libraries and tools that can be used by the other teams.
One of the libraries the platform team provided was a library that managed feature flags for the iOS app that our company produced. The primary function of the library was to get the current value of a given feature flag.
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➦ Thoughts on Testing
Jul 05, 2024
Testing has grown to be a very important part of software development. When I first started my career, I didn’t hear about writing tests until a few years in. Then we started writing tests for all our libraries. When I first got into Cocoa development, testing was not a part of the culture. That slowly changed, and now it is an important part of development on Apple platforms.
In many ways we are still catching up to other development cultures where testing has been much more ingrained in the culture, such as the web development world.
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➦ Pittsburgh - The Last One?
Jun 20, 2024
On June 6th, I flew out to Pittsburgh to see the Pirates play the Dodgers for the final stop in my lifetime goal to see a home game for every MLB team. What’s interesting is that the very first game I ever saw was the Dodgers vs. the Pirates in Los Angeles in 1976. So a fitting end. I didn’t plan it the way, it just happened. It took 48 years of being in the right city at the right time (due to business trips, vacations, etc.
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➦ Pointfree's SyncUps App: A Great Example Architecture for a SwiftUI App
May 11, 2024
In comments to my last article on The Composable Architecture readers have asked about examples of how I think an app should be written. In the article, I did mention my previous posts, which have examples for Clean Swift and MVVM, but those were written for UIKit. SwiftUI didn’t exist at the time.
So, this article will talk about what I think is a great example of architecture for a SwiftUI app.
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➦ The Composable Architecture: My 3 Year Experience
Apr 26, 2024
Introduction I recently finished a 3 year stint with a company that uses the Composable Architecture (TCA) from PointFree. I wanted to write about my experiences with TCA and some of the problems I see with it.
I think Brandon Williams and Stephen Cellis, the creators of TCA, are absolutely brilliant, and what they have managed to pull off with the creation of TCA is amazing. However, It’s just the two of them, and nobody, or no thing, is perfect.
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➦ St. Louis Cardinals, My Penultimate Baseball Stadium?
Sep 20, 2023
Busch Stadium
I finally went to another baseball game in my goal to see every MLB team at their home stadium. This time I went to St. Louis to see the Cardinals. I call this my penultimate stadium because just Pittsburgh is left after this one. More on that later.
Here’s the box score: Box Score
Click here to see a rundown of the game.
The Cardinals lost to the Milwaukee Brewers, 8-2.
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➦ From WordPress to Hugo
Apr 29, 2020
If you’ve visited this site in the past, you’ve probably noticed a change. I recently changed my blogging platform from WordPress to Hugo. Hugo is static site generator. I also changed my theme.
Why? I was never really satisfied with the performance of my WordPress site. Combine that with the fact that my site kept going down every month, I decided that it was time to do something and be more in control.
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