A Stanford University course, distributed free through iTunes U, that teaches iOS app development using Swift 3 and the iOS 10 SDK, covering building apps from the ground up.

Commenters point to it as a free, well-explained starting point for learning iOS development in Swift, often preferred over paid Udemy courses.

On Reddit (3)

1. Recommendssol369r/Entrepreneur2017in “Had an app idea, taught myself how to code so I could build it myself. Currently the app gets 100-200 downloads a day. AMA”

   Stanford has a great course on building apps for iOS using swift https://itunes.apple.com/us/course/developing-ios-10-apps-with-swift/id1198467120 I would go through there and also find some tutorials online on how to create really simple apps like a calculator/to do list app and follow along with…

2. Recommendszujinr/learnprogramming2017in “Trying to learn swift 3 and Udemy is offering classes for 15 bucks each. Is it worth it?”

   I've tried programming courses from Udemy and there's usually a free course that's much better and more logically explained than the ones offered from Udemy. Since you're interested in Swift, I would recommend Stanford iOS 10 programming course or Hacking with Swift (the 39-lesson free course)…

3. RecommendsXeophonr/learnprogramming2015in “I'd like to learn how to develop an Iphone app. Where do I start?”

   I'd start with the free iTunes U Course from Stanford about Swift!

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