The Guardian has released a paid-for iPhone (and iPod touch) app that makes reading the UK newspaper on Apple’s device a truly smartphone experience.

Along with features such as the ability to customize the newspaper’s ‘front page’, support for audio, finger-friendly navigation, including ‘swiping’ through photo galleries, the feature that really stands out is off-line browsing.

As I write over at TechCrunch Europe, the functionality…

… works in a similar way to music streaming service Spotify’s own iPhone app. Sections of the newspaper can be ‘cached’ in advance to enable access when outside of a WiFi network or mobile signal. As with listening to music, this is particularly appropriate for reading a newspaper on-the-go, such as when commuting on London’s Underground or any other subway for that matter. The app also offers access to the various Guardian podcasts, which can be downloaded in advance or streamed.