iOS 10 Mail Upgrades
The stock Mail app now lets you filter unread emails so that you only see the emails that you need to read still.
With the iOS 10 update you'll see a small filter in the lower left corner. Tap it and the middle of the bottom panel will show you if you are viewing unread or all of your messages.
On the iPad Pro, you can now use the Mail app with three panes to see more information on the screen at one time and better use the larger display.
There is now a unsubscribe option to leave a mailing list without hunting for the right link inside the message. If you get email from a mailing list a short message should appear at the top of the email in the Mail app.