Core ML makes it easy for developers to create smarter apps with powerful machine learning that predict, learn and become more intelligent.

HomeKit is even more accessible, with easier ways for developers and hobbyists to get started and new ways to authenticate devices using software — a great way for existing accessories to support HomeKit.

SiriKit gives developers the ability to integrate Siri into their apps, and with iOS 11 it expands to support more categories, including to-do lists, notes and reminders; banking for account transfers and balances; and apps that display QR codes.

MusicKit allows developers to integrate Apple Music features into their apps, providing access to over 40 million songs, recommendations, featured content and recent search.