"PM2.5 air quality."
           Respectively, provide a list mode, map mode, as well as my collection, and EPA hourly data synchronization, use this APP to ensure the smooth flow of the network.


# List mode:
           Screening can be displayed on the switch you want to see the level of contamination, and AQI / PM2.5, and can further inquiries complete information (O3, CO ...)

# Map mode:
           After the open position, can query the location of the current index, long press "info window" can add / remove my collection, and switching AQI / PM2.5 display

#my collection:
           Quick access to frequently used personal information