It’s a busy news day, so we’ll bundle these new apps together. REM have launched their official iPhone app, developed by Decipher Media. It includes news, a photo gallery and audio clips of their back catalogue, as well as full music videos. User-generated content is also a big part of the app, with photos and videos shot by fans at gigs. Tourdates and a merch store add logical revenue streams. Secondly, Universal Music Group has gone with Mobile Backstage for the official Jessie J app. As with other MB artist apps, there’s a big emphasis on sharing content too: videos, photos, audio and text – as well as the ability to comment on other people’s material, send and receive private messages, and tie into Twitter and Facebook. Finally – albeit most debatably – there’s David Guetta Life, whose one-line App Store description claims it’s “the official David Guetta app”. The brevity suggests that either it’s gone live too early before a proper description is written, or it’s not official at all.