I can highly recommend <
this free Norwegian forecast>, available for desktop, iOS and Android.
How good or bad a weather forecast is depends on the underlying calculation model. Not every service uses the same model, hence the differences in the forecasts: one apps says something else than an other or than the newspaper ... TV tells something different ...
The descendants of the Vikings do a good job, at least for Europe and they promise the same quality worldwide.
But nowadays the weather is less and less reliable and predictable.
Since I live on the coast, I like to have a look at the nautical sea weather report. There they describe the weather
situation: A high pressure area here, moving this direction, a low pressure area there, moving that direction, ...
The development of wind direction and wind strength is also mentioned.
These are basic values from which you can draw your own conclusions for your local situation with just a little practice and observation of the weather. If you live (and want to fly) up to 50 km from any coastline, I would recommend to consider the nautical weather forcast. If you're gonna fly at a coast anyhow, check if there are sailing clubs, marinas or harbours. Usually you will find a blackboard or a showcase close to the harbour master's office with the nautical weather forecast in that area for the next 12 hours.
The forecast you will read here is calculated by observing the surrounding weather stations plus the global forecast, so it should be the best you can get.
A similar forecast might be available in mountain areas by some weather stations, even mountain rescue stations.
Try if the have a telephone service.
So my conclusion: Apps are quite nice ... check what they tell by a 2nd source and your own observation.
If you are not in your home region: ask the locals!