The new mobile software is available as an over the air (OTA) download or as a download through iTunes on a Mac or Windows PC, and it’s compatible with 19 different Apple devices dating as far back as the iPhone 5, 4th-generation iPad, iPad mini 2, and the 6th-generation iPod touch. So what to expect from the update?
Find My AirPods
The most talked-about new feature in iOS 10.3 is Find My AirPods, which obviously only matters if the user owns a pair of Apple’s hot new AirPods. They're still next to impossible to find in Apple stores, so Amazon is really the only hope if the user want AirPods anytime soon.
There's now a new option in the Find My iPhone app that can track down AirPods, but it’s nowhere near as accurate or as useful as it is for iPhones and iPads since AirPods don't have a GPS radio or the ability to connect to any networks. Instead, this is basically a log that will show the user the last location where the iPhone was connected to their AirPods.
App Transition Animations
Users might not even notice this one, but Apple made a subtle change to the transition animations that are shown as apps open and close in iOS 10.3. They now have slightly more rounded edges, which is definitely not a big deal. But they also seem to move a bit faster, which is a big deal since it speeds up the interface a bit.
Weather in Maps
In the Maps app, users can now 3D Touch the weather icon to see a local forecast for the area.
Apple ID Profile
There is now a new Apple ID profile section in the Settings app that users will see at the very top of the first screen. It gives them access to a single page where they will find their full contact profile, security settings, payment information, iCloud account details, App Store settings, Family Sharing settings and a bit more.
Also of note, this page displays every Apple device where the user is currently signed in.
Users will now find a new section at the top of their iCloud settings page with a breakdown of how their iCloud storage is being used.
New File System
This is a big one, though it takes place completely behind the scenes so users won't even realize it's happening. Installing iOS 10.3 will automatically update their iPhone or iPad to use Apple File System (APFS) instead of HFS+. APFS is better optimized for NAND flash storage so files can be accessed more quickly, and it also supports stronger encryption.
Voice Call Continuity for Verizon
This is obviously a new feature that will only be appreciated by Verizon Wireless subscribers, but iCloud calling features are now finally supported if the owner uses Verizon. That means they can make or receive voice calls on their Mac, iPad, iPod touch, and Apple Watch.
There's a new Podcasts widget available now (it’s actually a pretty cool addition for podcast fans).