Why is the visibility of weather app in mobile phone 16. 1km at most?

At present, the mobile phone weather app used by everyone, Android owners are mainly original mobile phones and downloaded from third-party shopping malls. All meteorological data are from China Meteorological Bureau, which means it must be accurate or not; For Apple's mobile phone, the app that comes with the system is the data of American weather channel, which belongs to foreign data. This in itself violates the meteorological law, but Apple is a big company, so it has become a fait accompli. Ink weather, weather, my weather and other data. Everything downloaded from appstore is unified by China Meteorological Bureau.