I use and enjoy my Air and Sky (just arrived).
I can repeatedly crash/close the WeatherFlow app when trying to diplay the Humidity “bar histogram” graph.
app v2.0 (145) iOS 11.4 ipad mini 4. Open the SmartWeather app, choose Temp. On bottom right, select Relative Humidity. Line graph with dots appears for last three hours.
On lower left, hit minus (zoom out) and get last nine hours. Zoom out again, and get last three days as line graph.
Zoom out one more time - CRASH/App Closes. This is repeatable. I have to restart the app to display any weather information.
On other measurements (e.g. Temperature) the final zoom would change from a line graph to a bar histogram graph of daily min/max and mean values.
Humidity Bar Histogram display always crashes the SmartWeather app on my iPad.