Weather is downloaded directly from the NOAA web site: http://weather.noaa.gov
The departure and destination (From and To) airports METAR, TAF, and decoded weather are automatically downloaded. The downloaded weather is retained so that you can view what you have retrieved even when offline.
Pressing the refresh button will send another download request.
The date and UTC time displayed after the @ character is from your devices clock and time zone settings and indicates the time the data was received on your device.
Moving the slider control at the bottom of the screen changes the printed weather font size so you can customize the display to your zoom preference: