Shortly after Darksky left Android, started using Windy. [1]
Not necessarily a simplest solution for weather forecast, but provides wealth of information to satisfy my meteorological curiosity as well. (I pay Premium for higher precision data, and I think it worth every penny IMHO.)
On android, I switched to the open source "wX" app, which uses NWS data under the hood. It's incredibly detailed and although the UX is a little rough it's because it's aimed at power users, so I figured the HN crowd might appreciate it.
https://weatherflow.com/ is also good. I pay for their iKiteSurf product as a kitesurfer and it works decently well once you understand what "16 knots" at one spot vs another really means out on the water.
Not necessarily a simplest solution for weather forecast, but provides wealth of information to satisfy my meteorological curiosity as well. (I pay Premium for higher precision data, and I think it worth every penny IMHO.)
[1]: https://www.windy.com/