I used to work at the airport, and my shifts looked nothing like a Monday-to-Friday, 9-to-5. Two early shifts, two late shifts, then two days off. Repeat.
Whenever family or friends made plans, I’d have to work out whether I was free. I wanted something that could do that for me.
Everyone had an app they used, but the options were badly designed, full of ads, or a pain to set up. Sometimes all three.
So I built SwiftCal. A simple shift calendar that me from over 10 years ago would have loved.
Because plenty of people are still doing that same mental maths.