Gmail for iOS has got a major uplift with its latest update. Now iOS Gmail app supports multiple accounts.
What is in new version 2.0
#Totally new look and feel
#Profile pictures in messages,
numerous new animations from swivels to transitions and infinite scrolling in the message lists.
#When you search, autocomplete predictions will appear as you type, shaving off precious seconds (and
typos).
#You can RSVP to Google Calendar invites as well as +1 and comment on Google+ posts directly from the app.
#You can now login to up to five Google Accounts from the menu and switch between them with a couple taps.
Download link
Gmail - email from Google for iPhone, iPod touch, and iPad on the iTunes App Store