Hi Gab, Thanks for your answer. I see you are 320 driver, I am on the other side of the barricade on 737 :))
Obviously, before every flight you check all approved sources for TAF METARS SIGMETS etc, that is usually on company IPAD etc.
However, with windy you can get better picture about the weather then any metar. And it gives you different source of information to consider. I am sure you have already experienced very "relaxed" way of forecasting the weather in southern parts of Europe. Sometimes, TAF is cavok and when you arrive, you find yourself circling around numerous TCs.
Do you know app Pilot Weather? Very useful tool for quick access of the aviation weather. Almost everyone I know uses this app, not really for operational decisions but for generic planning of the day. I believe if you combine this kind of layout with a bit better search functions, groupings of the dept arr alts airports with the radar feed and rain/thunderstorm forecast+meteogram for the location of particular airport and enroute, you can build a bigger and more thorough picture of a weather you can expect.
Currently there is a function of searching particular airports and see metar and tafs. I am talking about developing this area whit data that are already in windy app.