Anyone know of an app that allows you to edit the subject line of a received email without forwarding or replying? I'm looking for an app that will let me change the subject lines to something more meaningful (as you can do in the desktop Outlook app). On OSX in the default Mail.app there's a workaround where you redirect an email, change the subject, save it, then move the saved draft back into your inbox. That doesn't work on iOS so I'm trying to find another way to do it. The new Airmail iOS app has a redirect function so I've tweeted the devs to see if that might work. Any other suggestions?