American iPhone owners spent an average of $47 on apps in 2016 according to research firm SensorTower. But it expects that to grow to $63 this year, $77 in 2018 and $88 in 2019.
That’s 86% growth from 2016 to 2019, although the app category hoovering up the lion’s share of this spending will come as no surprise: games.
In fact, of this $88 of predicted average annual app-spend by 2019, SensorTower thinks that games could account for for as much as $60 of it – 68%.

It suggests that entertainment will overtake music to become the second most-lucrative app category in the US by 2019, thanks to subscriptions in video-streaming apps like Netflix and HBO Now, to the point where entertainment apps will account for just over 9% of iOS app spending there.
The music total has not been published, although other studies have suggested that both Spotify and Pandora’s in-app subscription revenues make them top-5 grossing apps in Apple’s US App Store.