In the music world, there are the BIG 4 MAJORS. Universal Music Group, Sony Music Group, Warner Music Group and EMI (together with about 80% of the music market share)
In the book world, there are the BIG 6 Publishers. (together with about 70% of the book market)
What about the apps world?
In the book world, there are the BIG 6 Publishers. (together with about 70% of the book market)
What about the apps world?