iPad Air: 2360-by-1640-pixel resolution
at 264 pixels per inch (ppi)
https://developer.apple.com/sf-symbols
https://developer.apple.com/design/human-interface-guidelines/foundations/sf-symbols
https://xcodereleases.com
https://developer.apple.com/documentation/xcode
The deployment target is the earliest version of iOS that can run your app. If you set the deployment target to iOS 13.2, it will run on iOS 13.2 and above, including iOS 14.
~2021
https://developer.apple.com/forums/thread/678340
SupportedPlatform
https://developer.apple.com/documentation/packagedescription/supportedplatform
iPadOS16 iOS 16 iPhone 8 and later 12 Sep 2022
https://www.apple.com/ipados/ipados-16-preview
https://support.apple.com/ios/update
https://developer.apple.com/download/all
older versions: https://developer.apple.com/forums/thread/8121
Xcode 13.4.1
June 2, 2022
https://download.developer.apple.com/Developer_Tools/Xcode_13.4.1/Xcode_13.4.1.xip
https://cs193p.sites.stanford.edu
October 2021
How to make your app look great on every screen
2020
https://developer.apple.com/news/?id=nixcb564
https://stackoverflow.com/questions/13212288/is-there-a-shortcut-to-make-a-block-comment-in-xcode
MapKit
https://developer.apple.com/documentation/mapkit
PreviewProvider
https://developer.apple.com/forums/thread/665338
Observable Object
https://www.hackingwithswift.com/quick-start/swiftui/observable-objects-environment-objects-and-published
2021
vector-editing tool like Sketch or Illustrator
https://sfsymbols.com
https://stackoverflow.com/questions/57342170/how-do-i-set-the-size-of-a-sf-symbol-in-swiftui
Extra argument in call
https://developer.apple.com/forums/thread/697351
code samples:
LazyVStack
https://developer.apple.com/documentation/SwiftUI/LazyVStack
Grouping data with Lazy stack views
https://developer.apple.com/documentation/swiftui/grouping-data-with-lazy-stack-views
franzcalvo 