Welcome back to this week’s TechCrunch series of weekly TechCrunch reviews on mobile OS news , mobile apps, and the latest in the general app economy. As of last year’s end, the app industry continues to grow towards 2021 with downloads and consumer spending registering in the iOS and Google Play stores. Reports. App Annie estimates that worldwide spending on iOS and Google Play will reach $135 billion in 2021, and that figure will increase when the annual report, including third-party app stores in China, is released next year. Consumers downloaded 10 billion applications this year compared to 2020, which...