Sean Gallagher of Ars Technica wrote he was concerned for the app's future given Google's previous history of buying out and subsequently abandoning development on other startups such as reMail, Meebo and Quickoffice. The purchase and subsequent discontinuation prompted criticism from some tech sites, who were uncertain about the future of the apps.

Due to this, they also announced that development of both of Sparrow's apps would be ended except for critical bug fixes. On July 20, 2012, Sparrow and Google jointly announced that Sparrow had been purchased by Google and the company's employees would be added to their Gmail team. In March 2012, Sparrow for iOS was released in the App Store. It also includes features such as drag-and-drop attachments, Dropbox or Box.net support for uploading attachments, Growl support, Gmail labels and keyboard shortcuts, as well as quick replies, threaded replies and easy switching between accounts. Sparrow currently works with Gmail and Google Apps accounts, along with other IMAP email accounts. Sparrow uses a simplified user interface reminiscent of Twitter clients such as Tweetie or iOS apps, as opposed to a more traditional email style such as Apple's Mail or Mozilla Thunderbird. On July 20, 2012, the company announced that it had been acquired by Google and was ceasing continued development of the application except for critical bug fixes. After a 4-month beta period, Sparrow went on sale in the Mac App Store on Februand became the top paid and top grossing app in less than one day.

Sparrow was an email client for OS X and iOS.

Gmail client for mac os x