Apple releases new versions of its mobile operating system for iPads and iPhones (names iOS) all the time. Once a year it does a big overhaul of iOS, but throughout the year it also releases incremental upgrades and bug fixes.

It's important to keep your iPad or iPhone up to date. This helps ensure that it runs smoothly and doesn't crash, plus security fixes are put in place. Sometimes, apps update and won't run with older versions of iOS.

In the case of some older iPads and iPhones, you may find they're limited in how far you can update them. For example, an iPhone 4 may not let you update any further than iOS 6, as Apple is no longer providing the same degree of support to older devices.

In our video below, we show you how to update the software on an iPad or iPhone.

Video: How to update your iPad