https://techcrunch.com/2020/01/23/u-s-mobile-app-subscription-revenue-jumped-21-in-2019-to-4-6b-across-the-top-100-apps/

Outside of in-app purchases in mobile games, subscription revenue from non-game apps helped to boost 2019’s mobile consumer spend — a figure that reached $120 billion globally last year, according to a recent report by App Annie. Now, new data from app intelligence firm Sensor Tower indicates U.S. subscription app revenue grew by 21% last year from the $3.8 billion generated by the top 100 subscription apps to reach over $4.6 billion in 2019.

The firm also found that the subscription revenue by these apps accounted for 19% of the total $24 billion in U.S. consumer spend in 2019, across both the Apple App Store and Google Play.