I think i found two bugs in the app:
- in the wind forecast, 1hour, the arrows shown are corresponding to the next hour and not the time selected below (cf screenshot)
- comparing the data from the ecmwf model with the data from squid, i can see differences in the wind force and direction.
The one hour difference between the Meteogram and the wind arrows is known and must be fixed.
Concerning the difference with the Squid app, which weather model do you use?
Squid offers GFS data as a free version, and the ECMWF only as a paid version.