ITunes iTunes is a free computer program that allows for the storage and playback of digital media on one ' s personal computing device . It is available on several different platforms and on devices ranging from iPhone s to iPad s to full - sized desktop computers . Additionally , people using iTunes on several different devices can automatically sync the content in their possession , such that they are able to play their media on all the devices they own . The term is also used colloquially to describe the iTunes Store , a digital download service offered by . Some things on this service are free , while most are for purchase . Apple ' s business model in making iTunes available for free is the expectation that , at some point , the consumer will eventually buy materials in the iTunes Store . An adjunct to the iTunes Store is the App Store , a similar service that distributes applications . Purchases from both aspects of the digital storefront are nevertheless managed by the iTunes program on one ' s personal electronic devices . iTunes and " Doctor Who " . " Doctor Who " s involvement with the iTunes has been both significant and broad . The British Broadcasting Corporation has made much of the " Doctor Who " library available for sale . A significant measure of " Doctor Who " s popularity in the United States , for example , rests on the notion that it sits high atop the rankings of television shows sold through season passes in the US iTunes store . " Doctor Who " audio has also traditionally sold well . For the week ending 11 October 2013 , for instance , the Tenth Doctor adventure " Pest Control " was in the top 10 of the Australian store . Indeed , material from BBC Audio — and now its successor , AudioGO — has long been on the iTunes store , making missing episode audio broadly available around the globe since the mid - 2000s . Additionally , " Doctor Who " games began showing up in the early 2010s , such as " The Mazes of Time " . In general , material on iTunes is available — quite legally — elsewhere , such as on Netflix or the BBC iPlayer . However , iTunes did make " Doctor Who " history on 11 October 2013 by being the exclusive method of delivering the missing episode s of " The Web of Fear " and " The Enemy of the World " to the global " Doctor Who " audience . Region specificity . A significant element of the iTunes and App Stores is that material can be sold by global region . Thus , it is possible that content be made available only in the United States or British iTunes Store , but not in both . In the " Doctor Who " fan community , this has sometimes led to frustration , as some products have been released in the US and UK , but not in Australia and New Zealand . Apart from such individual restrictions , TV shows in general are only available in Australia , Canada , France , Germany , the UK and the US . Consequently , TV episodes of " Doctor Who " can only be purchased in these six regional stores . This resulted in a recent complaint from New Zealand that the recovered episodes of " The Enemy of the World " and " The Web of Fear " were not put in the New Zealand iTunes Store concurrent with their sale in the United States and Britain .