MacTracker is one of only four third-party apps I have on my Mac. I don’t think a week goes by that I don’t launch it at least once to check a spec, confirm a release (or discontinue) date, settle a nerd bet, etc.
Once I have a new iPhone and storage is no longer a concern, I’ll have it back on my phone as well. I love it. It’s like catnip to this trivia/list fiend. Sometimes I’ll just launch it and pick a category to go through all the products listed.
I love that it’s usually updated within a week or so - certainly within a month - of new products being introduced. An invaluable research/information tool! I’ve launched it eleventy-teen gazillion times over the years.