Apple scooped up a beloved mobile application with plans to fold it into its own offering. Dark Sky sells for $3.99 and is popular due to its hyper-local forecasts. It's important to point out that the app is popular not only with iPhone owners, but also with Android owners.
If you've ever used CodePen to prototype your own web apps or to closely inspect and fork someone else's code, then you know that one thing CodePen can't do is hide the API keys of any APIs that your app consumes in the process of doing whatever your app does. But now, there's a workaround.