Mailbox is a slick email client for the iPhone and iPad that helps you streamline your Gmail via intuitive swipe gestures. Mailbox looks similar to the standard Apple Mail client but has much better tools for managing your inbox. Swipe a message to the right, and Mailbox archives it. Swipe a message to the left, and Mailbox saves the email for later. Swiping a message to the right and holding deletes it.
One interesting feature allows you remove an email from your inbox and have it returned at a predetermined time. That's great for users who put off or forget to respond to important emails.