They sold between six and seven million copies of the paid version between the release (December 2009) and September 2010 [1]. Rovio sold the game for between $1 and $2 (the regular price was $2 but they had at least one 50% off sale and it now seems to be down to $1 permanently).

If we assume an average revenue of $1.05 per copy ($1.50 minus Apple’s 30% cut) and 6.5 million sold copies in nine months their revenue would be about three quarters of a million per month.

The above linked TechCrunch article has a seemingly more recent but unsourced number of twelve million copies sold. That would put the revenue at about one million per month.

I’m not sure how accurate that estimate is, though. They sold a million copies of their Halloween version in only six days [2], that’s quite a bit more. (If I remember correctly there was no free version of the Halloween special.)

[1] http://mobilewebgo.com/how-did-angry-birds-become-blockbuste...

[2] http://www.rovio.com/index.php?mact=Blogs,cntnt01,showentry,...

So in essense, they are getting approximately the same revenue from iOS's 'purchase the app' as from Android 'ad revenue' model. Interesting, thanks.

up till now about 4 million download from iOS ( in the same article mentioned). so about 4 million

Wow, I thought they had sold a lot more on iOS. So in one month of ad revenue on Android has brought in 25% of total iOS sales. If this ad revenue is consistent that's pretty incredible news for Google. It will have made clear that ad revenue on mobile devices is where the money is (and with Google being an advertising company, this is great news).

I believe that figure includes Angry Bird HD sales, which retails for $4.99, not $0.99

The article says 12 million paid downloads, right?

there is another source telling that they sold out 30 million downloads /year. so the profit must be really high.

(less 30%)