While iPhone is only about 3% of the handset penetration it is responsible for a huge amounts of activity
- 1.3B Internet users
- 1.8B Fixed line telephones
- 2.9B Mobile Phones
- 4B Mobile users
But out of 4B mobile users there are only 40M iPhones (inc about 20M iPod touch). Howver these 40M have downloaded 2B apps from the app store. I looked at mine and i have 142, which was a bit if a shock and shows i was above the avergae amount of apps downloaded. take a look at an app store statistics article here.