From the Sparrow team:
We’re excited to let you know that Sparrow has been acquired by Google!
We will continue to make available our existing products, and we will provide support and critical updates to our users. However, as we’ll be busy with new projects at Google, we do not plan to release new features for the Sparrow apps.
Such a shame. Sparrow on Mac and iOS are two of my absolute favorite apps, and they are still far too young to be sunsetted. I assume this means the Gmail iOS app will be updated with some of Sparrow’s thinking, but let’s not kid ourselves. This means the death of some great apps, potentially at the risk of making some mediocre Googleified versions of Sparrow.
All that being said, the Sparrow team are incredibly talented, and they deserve their payday too.