From the estimated 2.5 Billion (Yes, Billion) mobile app downloads in 2009, Apple has more that 99% share according to new research, and this equates to about $4 Billion in revenue.

If the figures are right, then 2010 will see 4.5 Billion app downloads rising to 21 Billion in 2013. However, it is also reckoned that 80% will be free apps downloaded from anywhere.

So, what’s the point of this post? As the use of smartphones grows massively (and yes, I finally sold out and got mine for Xmas too) in the next 3 years, so will the opportunity for people to get in on Apple’s act by creating their own apps or app stores.