Android is about 71% of the worlds smartphone market. iOS is around 28%. Even if 100% of iOS users had facebook installed, I doubt it's as large as the number of FB-using Android users. https://gs.statcounter.com/os-market-share/mobile/worldwide
I wonder — is an iOS user worth any more or less to an advertiser than an Android user? I assume more — maybe even a lot more. Would adjusting shares to reflect that make Apple’s share look more significant (thus the major marketing push by FB)?
