https://blog.wongcw.com/2021/01/09/app-store-2020%e5%b9%b4%e7%b8%bd%e6%94%b6%e5%85%a5640%e5%84%84%e7%be%8e%e5%85%83%e5%90%8c%e6%af%94%e5%a2%9e%e9%95%b728/
App Store 2020年總收入640億美元同比增長28%