Show HN: The Only Weather App You'll Ever Need

There are not details on this website about how it works, what data it needs, etc.

All CTAs just lead to a signup page. Why do I need an account to check my weather forecast? A ZIP code, sure.

Also the "Core weather is free" qualifier leads me to believe that some features not in "Core weather" are paid? Which are those? I'd want to know that information before I go through the trouble of creating another account.