Apps now generate the main money of your entire content on offer inside the iTunes store, in line with the most recent estimates from Asymco analyst Horace Dediu.

The analyst checked out Q2, 2007 – the quarter just before the iPhone launch, when there have been no iOS apps and nearly all of money was spent on music – as much as Q4 last year.

Since the App Store first opened in Q2, 2008, apps have gone from having under five per cent share of revenues ($4 per year) to 35 per cent ‘share of wallet’ ($16) on the end of 2012. Music, by comparison has dropped from a 40 per cent share ($39) all the way down to 27 per cent ($12).

It’s worth noting, however, that although the choice of iTunes accounts has now passed 500m, the ARPU has greater than halved since its launch, from $99 to $45 per iTunes account.