iOS 10 features a redesigned Lock screen with 3D-touch enabled notifications that offer up more information, a more easily accessible camera, and a new widgets screen that houses widgets formerly located in the Today section of the Notification Center. There's a redesigned Control Center, also with support for 3D Touch, and a new Raise to Wake feature wakes up the screen without bypassing notifications.
Siri can do a lot more in iOS 10, thanks to a Siri SDK that allows developers to build Siri support into their apps. You can now ask Siri to do things like summon an Uber or send a message in WhatsApp.
Messages has been overhauled with new features like background animations, bubble effects, rich links, and Digital Touch, the sketching feature first introduced on the Apple Watch, allowing users to create drawings and annotate photos and videos. Handwritten notes, hidden "invisible ink" messages, quick "Tapback" replies, and bigger emoji are new in Messages, and there's even a predictive emoji feature that will suggest words that can be replaced with emoji.
Messages has its own Messages App Store, so developers can create apps that can be used in iMessages. Apps add almost unlimited capabilities to Messages, from sending stickers and GIFs to making payments to making collaborative dinner orders.
A dedicated "Home" app is available for HomeKit devices, and it's now possible to delete almost all pre-installed apps that are unneeded. Photos features impressive facial and object recognition capabilities, which power a new Memories feature for rediscovering forgotten moments.
Both Maps and Apple Music have been redesigned with cleaner interfaces that are simpler to use, with Maps gaining proactive suggestions and integrated third-party apps and Apple Music gaining better content discovery and a new focus on lyrics. Apple News has also been overhauled with subscriptions, breaking news notifications, and better organization.
Apple's QuickType keyboard is smarter in iOS 10 with contextual predictions, and Apple Pay is available on the web. Game Center has been largely eliminated, and many other apps, like Notes, Clock, and Phone have been updated with new features.
The main new feature in macOS Sierra is Siri integration, bringing Apple's personal assistant to the Mac for the first time. Siri offers many of the same capabilities available on iOS, along with Mac-specific functionality like the ability to search through documents to quickly find files.
There's also an option to pin Siri search results to the Today section of the Notification Center or to add them to documents to provide up to date information at a glance. Siri can also do things like search through Photos, set reminders, initiate FaceTime calls, and more.
In Photos, computer vision and new deep learning algorithms allow the app to recognize people, places, and things in images using facial, object, and scene recognition, using the information to group images into intelligent collections and enable powerful search capabilities. A new "Memories" tab creates curated collections of past photos to resurface old memories, and there's a new "Places" album for displaying all photos on a world map.
Messages has rich links for previewing web content and watching video clips directly within the app, and it supports iOS 10 sister features like bigger emoji and "Tapback" options for quickly responding to messages with icons like a heart or a thumbs up. In iTunes, Apple Music is redesigned with a bolder look and a simpler interface to improve music discovery.
Continuity features are expanding in macOS Sierra with the introduction of a new "Auto Unlock" option for Apple Watch owners. When an authenticated and unlocked Apple Watch is in close proximity to a Mac, it unlocks automatically without the need to enter a password. Also new on the Continuity front is Universal Clipboard, a feature for copying something on one Apple device and pasting it on another.
Deeper iCloud integration makes all of the files stored on the desktop or the documents folder of a Mac available on all of a user's devices, including other Macs, the iPhone and the iPad through the iCloud Drive app, and the web through iCloud.com.
All Mac apps, first and third-party, are able to use multiple tabs in macOS Sierra, so in apps like Pages, users work with multiple tabs instead of multiple windows when accessing more than one document.Picture in Picture multitasking is also new in the OS, allowing users to watch a video while doing other things.
Apple is introducing a new Apple File System (APFS) built around SSDs and engineered with native encryption as a primary feature. There's also a new Optimized Storage feature that frees up space on a Mac when storage is getting low.
Along with iOS 10, macOS Sierra supports Apple Pay in the web browser, letting users pay for purchases made on the web with Apple Pay. Payments are authenticated through a connected iPhone using Touch ID or an unlocked Apple Watch.
For a full overview of all of the new features in macOS Sierra, make sure to check out our macOS Sierra roundup.
watchOS 3 introduces a new Dock that houses a user's favorite and recently used apps so they're easier to access. Favorite Apple Watch apps saved to the Dock are kept up to date and are able to launch instantly, cutting down on app loading times.
Navigation has been improved, with left and right swipes now used to change the watch face. A newControl Center with more information is available when swiping upwards on the Apple Watch screen.
Activity sharing is new in watchOS 3, allowing Apple Watch owners to share their workout and activity information with friends to compete and stay motivated. New activity-based Smart Replies in the app are available to communicate with friends and family over activity achievements.
There are settings in the Activity app to customize workouts and activities for Wheelchair users, with wheelchair pushes contributing to all-day calorie goals and "time to roll" notifications instead of "time to stand" notifications.
A new Breathe app is designed to guide Apple Watch owners through daily deep breathing sessions to cut down on stress and induce relaxation, and there are also new Reminders and Find My Friends Apps.
There are three new watch faces, including Minnie Mouse, a simple numerals face, and an Activity face that shows activity rings, plus more faces are able to work with complications.
An SOS feature will automatically call emergency services when the side button is pressed no matter where you are in the world, and the Apple Watch can now be used to unlock a password protected Macwith new Continuity functionality.
In the Messages app, a redesign makes it quicker to reply to incoming texts, and a new "Scribble" feature allows you to write replies on the Apple Watch face with a finger.
For a full overview of all of the new features in watchOS 3, make sure to check out our watchOS 3 roundup.
tvOS 10 builds on the initial tvOS features, introducing improved search, expanded Siri capabilities, single sign-on authentication, and a dedicated Apple TV Remote app for iOS devices.
Siri is able to search for movies and TV shows by topic, bringing up content around a theme like "high school comedies from the 80s" or "movies about baseball" or "TV shows about dinosaurs." Through a newLive Tune-In feature, Siri can also go directly to a live channel in a supported app with commands like "Watch CBS News" or "Watch ESPN."
Also new is Siri support for searching YouTube and managing HomeKit accessories.
Single-Sign On for pay TV apps is available in the latest version of tvOS, allowing users to sign in once on the Apple TV with their cable credentials to access live cable content included in a cable subscription.
Third-party apps can do more with new developer APIs for recording and live broadcasting, accessing iCloud Photo Library photos, using HomeKit within third-party apps, and developing apps with more complicated controls that necessitate a controller.
A new Apple TV remote app for iOS devices mirrors the capabilities of the physical Siri Remote with touch navigation, Siri integration, and gameplay support, and tvOS is also gaining features from iOS 10.
The Apple Music app has been redesigned and there's a new "Memories" feature in the Photos app.
Other new Apple TV features include a dark mode to darken the interface, a Continuity option that connects to the iPhone for easier text input, and an option for automatically downloading universal apps.