It once again features four app shortcuts along the bottom (flashlight, stopwatch, calculator and camera app) and moves the fifth Beatle, Night Shift, to a new, bigger spot above the quartet.That fixes an issue where people said having five app shortcuts in that bottom row, a short-lived idea that came about when Night Shift debuted in i OS 9.3, made the buttons a tad too small.You can immediately respond to messages as soon as you pick up your phone, without ever leaving the lockscreen. No more digging around the home screen and layers of app menus to check vital information.

You can delete built-in apps, control all your smart-home devices from one app, use Siri with third-party apps, and a whole lot more in i OS 10.2! If the download does not begin right away, you may see a notice: "Preparing to download." Give it a couple of minutes and the download will begin shortly.

Everything you love is now even better with i OS 10, our biggest release yet. Apps can now extend to Messages, Siri, and Maps to provide more engaging functionality.

Update January 23, 2017: Apple has just released i OS 10.2.1 for i Phone and i Pad, which offers bug fixes and security improvements. Here's how to download and install the update on your i Phone or i Pad i OS 10.2.1 includes bug fixes and improves the security of your i Phone or i Pad The easiest way for most people to download i OS 10.2 is over-the-air, directly on their device. If you have limited space on your device or software update isn't working for whatever reason, you can update using i Tunes.

You can download i OS 10.2.1 using the same procedures as previous updates. If you're running a the developer or public beta, Apple might push you an update if the build numbers are different (we're still checking on that).

Apple's i OS 10 update for your i Phone and i Pad really lives up to the milestone software version number, bringing major changes to your daily phone and tablet routine. You won't even recognize portions of the interface; that's how different things are.

But don't worry, almost all of the new i OS 10 features are for the best – and absolutely free to download today.

Tech Radar's take: Being able to clear all notifications has been a long time coming.

Our only complaint is that it didn't arrive sooner.

Tap it once to just dismiss the group of notifications.