Google drops email client Sparrow for iOS, looks for migration to Inbox
Google hopes that those looking for Sparrow, and current users of it, both migrate over to its highly regarded Inbox. The latter is a free app available via invitation only. Inbox helps you sort your Gmail, snooze it and will even allow you to retract a sent email before it is read.
Recently, Google said that 70% of Inbox users are Android owners with 28% rockin' iOS. Google would like to see the usage data broaden out more with more iPhone and iPad users installing the app. You can ask for an Inbox invitation by emailing your request to email@example.com.