About 100 millions of iphones are sold worldwide. At the most basic level, iPhone apps can range in cost from $0 – the do it yourself model – up to $25,000 – $100,000 for sophisticated interactive apps that require months of coding, design and development.
The total as of September 30th 2009 was 34.3 million, which means sales are probably closer to 30 million now. According to the chart below, 21.7 million iphones had been sold as of the middle of 2009. That number is likely much higher now due to high sales at the end of 2009.
Estimated 33 million sold. All numbers from Apple's Quarterly Earnings Reports 4.4 million q1 2009 apple.com/pr/library/2009/01/21results.html 3.8 million q2 2009 apple.com/pr/library/2009/04/22results.html 5.2 million q3 2009 apple.com/pr/library/2009/07/21results.html 7.4 million q4 2009 apple.com/pr/library/2009/10/19results.html 2.3 million q1 2008 apple.com/pr/library/2008/01/22results.html 1.7 million q2 2008 apple.com/pr/library/2008/04/23results.html 0.7 million q3 2008 apple.com/pr/library/2008/07/21results.html" rel="nofollow">apple.com/pr/library/2008/07/21results.html 0.27 million q3 2007 apple.com/pr/library/2008/07/21results.html" rel="nofollow">apple.com/pr/library/2008/07/21results.html 6.9 million q4 2008 apple.com/pr/library/2008/10/21results.html 1.12 million q4 2007 apple.com/pr/library/2008/10/21results.html.
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