filters -- you can easily color code and label incoming emails with a few simple rules so that your inbox isn't a cluttered mess. Unfortunately, however, if you're a Gmail user, you were only able to create and edit those filters on the web and not on the Android app, which seems like a weird oversight. It's even more embarrassing, then, that Google rival Yahoo has just introduced this feature into its own Android app. Yep, as of today, Yahoo Mail for Android will let you create, update and remove filters. Simply tap the option at the bottom of the sidebar and you'll be guided through setting one up -- as usual, you can filter emails by sender, recipient or its content. Of course, you'll have to be a Yahoo Mail user to take advantage of all this in the first place; hopefully this will light a fire under the folks at Mountain View to add this much-needed feature so Gmail users won't feel left out. If you do use Yahoo Mail on Android, however, go on and download the latest update so that you can get to reaching Inbox Zero that much faster.