Air Watcher

Air Watcher support both old Today Extension and new brand new iOS14 widget, and dark mode! You can long press the new widget and switch between different countries. Air Watcher is committed to be completely free and no ads! Monitor the air quality in the five supported cities in China. The data source is from U.S. Department of State Air Quality Monitoring Program. Support iOS14 new widget! In most of the time, you don't even need to open the app. More features to come!