13 really useful new features in iOS 9 that most people don't even know exist

The latest version of Apple's mobile operating system, iOS 9, was released yesterday and it introduces a whole host of new updates to the party.

While there was nothing radical in terms of design (that all came in iOS 7), many of the updates focus on specific apps, tweaking the experience to make them more usable or look cleaner. There is a new font, called San Francisco, a smarter Siri, the ability to block ads, and a new app switcher, to name a few.

As the update is a big one, some of the new features got lost in all of the excitement surrounding the release. Here's a comprehensive run-down of 13 new features you probably didn't know about.