I've submitted my first app to the iTunes App Store. Don't expect anything that useful - it's part of my homework. It's the most minimal viable product I could think of! All it does it count when you tap it.
This has been a good learning experience for me. Swift is an interesting language to learn. The most painful part of the whole experience was trying to get the box to stay in the middle of screen in all orientations and screen sizes. I had flashbacks to my early attempts at responsive design in HTML.