Gmail for iOS Updated With Background Refresh
Before the update, users could receive notifications when new mail was received, but opening the app was required to download the messages.
The app also supports a simplified sign-in that allows users to sign into all Google apps when signing into a single app such as Maps, Drive, Chrome, or Gmail.
Background app refresh: Gmail now fetches your mail even when it is not open so it will be waiting for you when you open the app. Requires iOS 7 and at least one type of notification (badge, alert, or banner) to be turned on.Gmail can be downloaded from the App Store for free. [Direct Link]
Simplified sign-in: Signing into Google Apps such as Gmail, Maps, Drive and Chrome just got easier. Sign in to one, and you'll be signed in to all automatically.
Note: In some cases, you may need to sign-in to Gmail again after this update.