iOS 9.3: Check out the new features on iPhone and iPad update?

Update: Apple is up to iOS 9.3 beta 7, meaning its new iPhone and iPad update is nearly ready. Here's what's new for 2016.
iOS 9.3 is the biggest incremental iPhone and iPad update in several years, as Apple has new software features that go as far as changing your sleeping habits.
That's right, the iOS 9.3 beta 7 download that we're testing out has the long-sought-after iPhone Night Shift feature to control the blue light levels emitted from your screen.
Plenty of other useful features are here too: multi-user support for students, Apple Notes locked behind a password and tweaked News, Health and Apple CarPlay apps. In the US, Verizon gains Wi-Fi calling - finally.
While the final iOS 9.3 release date hasn't officially been announced, this beta update appears to be almost feature-complete and, so far, bug-free. Here's what to expect when it does launch.

iOS 9.3 release date

iOS 9.3 is deep into beta numbers - you can currently download iOS 9.3 beta 7 - and it's being tested by both developers and the public. There's ample reason to believe it's days from launching.
We have more than a hunch that Monday, March 21 is going to be that day. That's when Apple holds its next press conference, and it'll introduce new devices. So why not new software, too?
The smaller 4-inch iPhone SE and normal-sized tablet, a 9.7-inch iPad Pro, are supposed to make their big debut, and they'd surely go over better with the new update in place.

Night Shift

I've read dozens of news stories that tell me I shouldn't go to bed staring at my iPhone 6S Plus, my iPad Air 2 or my new MacBook, but do I follow those wise instructions? No.
Night Shift is the iOS 9.3 solution I've been waiting for, because it won't require me to change my nighttime reading and working habits. It automatically tints my screen to warmer colors.

 

"Many studies have shown that exposure to bright blue light in the evening can affect your circadian rhythms and make it harder to fall asleep," according to Apple.
What's neat is that iOS 9.3 uses the clock and geolocation to determine the sunset, and the screen becomes progressively more orange-tinted throughout the night, exactly like f.lux on Macs and Reader's Edition on Amazon Kindle HD 8.
The completely optional Night Shift mode is found in Settings > Display and Brightness > Blue Light Reduction, with a slider bar to control how orange or blue it looks, and to adjust the schedule.
As of iOS 9.3 beta 2, Apple modified the swipe-up-from-the-bottom Control Center overlay menu to add Night Shift to the bottom row of quick settings. It's flanked by flashlight and timer on the left and calculator and camera on the right. That's how important this feature is for the new update.
It's all designed to allow your eyes to relax so that falling asleep is easier, and when it's time to wake up, the screen color shifts back to normal.

Multi-user user support... kind of

Buried at the bottom of the iOS 9.3 beta release notes is the first sign of multi-user support, only it's strictly meant for classroom iPads right now.
Apple calls this new app suite 'iOS in Education', and the highlight is the fact that it enables students to log into any iPad in any classroom and pick up where they left off.