The most popular email apps usher in some sort of innovation: Sparrow had incredible simplicity, Mailbox had snoozes, and Inbox has its intelligent cards and bundles. Their popularity came from changing the way we work with email â so it's easy to overlook today's launch of Airmail for iOS, which has no one standout feature, as just another app. But even though Airmail doesn't have any one standout innovation, it does something that few other mobile apps dare to do: let you do anything you want....
