Most of the obvious animations that Apple uses in iOS can be seen when you launch or exit an app or switch between them, but during my own testing I wasn’t able to notice any significant differences between an iOS 10.2.1 device and an updated 10.3 one side-by-side. However, iOS does feel slightly more responsive during overall daily tasks on my iPhone 6S+.
Apple’s new file system in iOS 10.3, that’s rolling out to millions of iPhones and iPads, should help make the OS feel a little faster, too. As APFS is designed to be low latency, this should also improve read and write speeds on iOS devices. You won’t notice this immediately, but apps that write a lot of data to a disk (like video processing) might seem faster.
iOS 10.3 could help rectify the many frame drops, skips, and odd interface bugs in iOS 10. Chris Pirillo has been documenting a large number of problems with iOS 10, claiming that Apple has failed to deliver a smooth 60fps promise for iOS. It’s clear from the tweaks in iOS 10.3 that Apple is at least aware that it needs to improve its iOS animations.
Why iPhone users should update to iOS 10.3 right now
Attention iPhone users: You may want to update to the latest iOS as soon as you can.
The latest update doesn't have any major new features, but it does include a major patch for a Safari security bug.
According to Lookout, the latest update fixes a scam that used pop-up dialogs on Safari that would lock out a user from using the browser.
The system would then ask for money, in the form of an iTunes gift card, to unlock the browser.
The Lookout reports that attackers displayed threatening messages to scare victims, but didn't actually take any data from the phone.
Other iOS 10.3 features include a Find My AirPods feature, and an update to Maps.
The new software will also speed up your phone, due to tweeks in animations for app transitions.