Mainly this week doing some reading into App audiences - segmentation etc.
This is a good overview if a bit technical
https://support.google.com/admanager/answer/6253282?hl=en
and also some of the stats on this page relating to the number of App downloads
https://www.businessofapps.com/data/app-statistics/
The ones that caught my eye:
194 billion app downloads in 2018, up from 178 billion in 2018
Sensor Tower identifies WhatsApp as the most-downloaded app of 2018 (over 900 million), while App Annie gives the accolade to Facebook Messenger
Games were the most downloaded app type on iOS and on Android in 2018
Personal finance apps saw the greatest increase in reach across key markets, with an average increase of 27.8%
The global mobile gaming audience is estimated at 2.2 billion
China accounts for nearly 50% of global app downloads
90% of iOS App Store apps are free, as are 95% of Google Play Store apps