It's sobering to think this has now been so long ago but still: this is absolutely not true. Angry Birds came out end of 2009 and games were available for more than a year by then. See top 2008 here https://arstechnica.com/gaming/2008/12/apple-reveals-most-do... and top 2009 here https://www.ign.com/articles/2009/12/09/the-most-popular-iph...
It's sobering to think this has now been so long ago but still: this is absolutely not true. Angry Birds came out end of 2009 and games were available for more than a year by then. See top 2008 here https://arstechnica.com/gaming/2008/12/apple-reveals-most-do... and top 2009 here https://www.ign.com/articles/2009/12/09/the-most-popular-iph...