Yahoo Mail received a pretty big update a couple of months ago with an interface revamp to Material Design (or Yahoo's interpretation of it), Account Key to sign in on your mobile device without having to input your password, and support for other mail providers like Outlook, Hotmail, and AOL. You may have noticed that Gmail wasn't present in that list, but that changes today.
Yahoo! is rolling out an update to version 5.1 of Mail that adds Gmail support so you can start checking your Googly inbox from Yahoo's app. I don't know why you'd want to do that, but I'm sure there are valid reasons why such a feature would be important. Gmail's implementation appears to be well done, with archiving, gesture, and search support.
Other improvements to the app include the return of Select All to batch manage your email, easier inbox switching from the side bar, and a few more fixes. Here's the full changelog.
- Connect Gmail mailboxes to read, organize, search and respond to your Gmail messages within the Yahoo Mail app
- Select all messages in a specific folder on your device - just tap on the select all icon in the upper-left corner when moving or deleting multiple messages
- Interface improvements for account switching, settings, touch targets, and message list readability
- TalkBack accessibility improvements
- Performance enhancements
The update is slowly rolling out to everyone on the Play Store, but you can speed the process by grabbing the APK file directly from APK Mirror.