Mailbox

Mailbox is an app that makes it easier to keep up with the emails that you receive and send along with the notes that you want to keep.

There are several features of the app, such as swiping through your emails and deleting the ones that you don't want to read. You can also set your email on snooze so that you aren't alerted when you get a new message, which is beneficial if you're in a meeting or if you're asleep. There are also visual images that will give you a general idea as to what the email is about before it's opened.