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If you are interested in iOS app development and you are a beginner like me, I can heartily recommend these resources: Hacking with swift,  Swift 3 for absolute beginners  (free) The Complete iOS 10 Developer Course - Build 21 Apps   (paid) Ray Wenderlich  (free)

If you ever need to integrate AdMob ads into your SpriteKit game or Swift app, these helper classes are very useful: https://github.com/crashoverride777/Swift-AdvertisingHelper They make it easy to display ad banners wherever you like in your app, e.g. in a Game Over scene. Thanks to crashoverride777.