Apple’s Use of Swift in iOS 12
Apple added some new features in iOS 12 and with no surprise the corresponding applications contain some Swift code. This is the case of the ContinuityCamera and Measure apps. Previous existing apps have been updated and some of them contain more Swift code: AppStore, Books, Music, News, SharingViewService and Stocks.
As we can see, Apple is slowly using Swift in more apps with each new iOS release, but the number of these apps is still really limited. Here is a chart showing the evolution of the number of binaries using Swift in iOS (without counting the Swift libraries)[…]
More than double the number of binaries as last year.
Update (2018-09-28): See also: Hacker News.