This is an app I built using Xcode and SwiftUI.
I followed a few tutorials before to prototype some apps to get a feel for the language.
After watching a few, I started prototyping using the QRTag API since I thought it would be the best fit for a first time app considering its simplicity. Using a partial example from stack-overflow, I got the basic image fetching complete and started working on the input box. This was a bit weird to me, as I've never used a language with States or "Environmental Objects" (I've yet to research these). In the end, I found the DispatchQueue functions actually did exactly what I wanted (it seemly forces an update of any variable used in that async function.)
After completion of the app, I found it to be pretty straight forward and only took a couple of hours. The part that took ages was borrowing a friends' apple dev account to actually build the app. I'd researched before that you were able to soft build the app but turns out that's no longer possible? So we ended up fighting with apple's dev web UI for about an hour to actually register the mac we were using. (Now that I understand how it works, It's pretty self-explanatory).
All in all it was actually quite a fun experience and given the opportunity and A good idea I'd do it again.
Researching some "packages" I might use in the next app I build, here are some examples I'd use
https://github.com/aheze/SwipeActions // really neat gesture controls and has an MIT license what is a bonus
https://github.com/aheze/Squirrel // not really a "package" but still IMO a must-have for using the iphone emulator