I need a whether app fairly often and luckily the federal whether agency of our country offers a pretty great one for a one time flat fee of 3€ that has become

I need a whether app fairly often and luckily the federal whether agency of our country offers a pretty great one for a one time flat fee of 3€ that has become an invaluable part of my (hobby Pilot) flight preparation routine. To get a different / global perspective I also pay for windy premium.