Gmail for iOS receives update with three new features2
Another new feature added with this update allows you to open an attachment from Gmail into any app. Gmail for iOS is free and can be downloaded from the Apple App Store. For those keeping score, Gmail for iOS is now on version 4.0.
If you are a regular Gmail user on iOS, let us remind you that you might want to consider seeking an invitation for Gmail's Inbox. This is an app that helps you organize your inbox better and also gives you the power to rescind an email before it is read. You can also "snooze" an email until you need it. Recently, Google 86'd email client Sparrow for iOS, hoping to have its members migrate to Inbox. 30% of Inbox users come from iOS at last count. To request an invite, send an email to firstname.lastname@example.org.
source: Gmail (iOS) via MacRumors