Preview at WWDC likely in June, followed by September launch.
Apple Seeds First Beta of iOS 9.3 to Developers
The iOS 9.3 beta is available for download immediately from the Apple Developer Center, and a public beta is likely to be available in the near future. With iOS 9.3, developers can also download the update over-the-air using the new iOS 9.3 Configuration Profile.
There have been no hints about what might be included in iOS 9.3, but as a major .1 update, it’s likely to include new features and operating system tweaks that improve performance. As with all iOS updates, it will undoubtedly include a long list of bug fixes to address problems found since the release of iOS 9.2. We will update this post with any changes that are discovered in the beta.
What's new in iOS 9.3:
Apple Watch - With iOS 9.3 and watchOS 2.2, the iPhone is able to pair with more than one Apple Watch. Both updates are required, with each watch running watchOS 2.2 and the iPhone running iOS 9.3. WatchOS 2.2 was seeded to developers alongside iOS 9.3.
Night Shift - iOS 9.3 includes a feature that reduces blue light at night, much like f.lux does on a Mac.
Notes - Notes is now password protected and there are new features for sorting by date created, date modified, or alphabetically.
Apple News - News algorithms have been improved to offer more tailored articles in the For You section. There's also a new landscape mode and in-line video playback.
Health - Health has been updated with a new interface that makes it easier to see move, exercise, and stand data. There's also a new menu in certain categories to help users discover apps that can be used to track health data.
CarPlay - CarPlay includes iOS 9 features like New and For You sections in Apple Music along with a Nearby feature in Maps for discovering the best local restaurants, coffee shops, and more.
Education - iOS 9.3 includes multiple Education-oriented features including shared iPads for students, a new Classroom app, and an Apple School Manager.