All good things must come to an end and this appears to be the case for Dark Sky. On March 31, 2020, Dark Sky announced on their blog that they have a new home at Apple.
iOS App
There will be no changes to Dark Sky for iOS at this time. It will continue to be available for purchase in the App Store.
Android and Wear OS App
The app will no longer be available for download. Service to existing users and subscribers will continue until July 1, 2020, at which point the app will be shut down. Subscribers who are still active at that time will receive a refund.
Website
Weather forecasts, maps, and embeds will continue until July 1, 2020. The website will remain active beyond that time in support of API and iOS App customers.
API
Our API service for existing customers is not changing today, but we will no longer accept new signups. The API will continue to function through the end of 2021.