Completely rebuilt from the ground up, Version 2.0 of the app brings with it a new look and feel, which Google hopes will result in a faster, sleeker and easier experience when using the app.
New features in the app include updated animations, infinite scrolling in message lists, and profile pictures in messages. The app also makes autocomplete predictions when you search and allows you to respond to Google Calendar invites and +1 Google+ posts from directly within the app.
The updated Gmail app is available now in the App Store [iTunes link]. Due to its exceptional popularity, some users are currently reporting issues downloading the app. If you run into trouble, Google suggests waiting a few minutes and trying again.