Gmail development chart after 9 years of operation.
1/4/2004: Gmail was officially released with a beta version only for invited users. As the first Ajax-based webmail service, Gmail at that time provided 1 GB of storage per user, 20 times more than standard email service providers.
1/4/2005: Gmail celebrates its first birthday and raises its capacity to 2 GB.
February 7, 2006: Gmail provides a chat service.
February 10, 2006: Google introduces the ' Gmail for your domain' application (later available in Google Apps) to allow businesses and schools to use Gmail in their organization.
April 12, 2006: Google Calendar service was born.
May 1, 2006: Gmail supports more languages like Hebrew and Arabic, bringing the total number of languages to 40.
February 14, 2007: Gmail celebrates Valentine's Day by allowing open accounts for all users around the world.
October 31, 2007: Gmail became one of the first email services to offer a free IMAP protocol for all devices. Users can access Gmail anytime, anywhere.
September 15, 2008: Gmail has a ' Forgotten Attachment Detector' feature that will prompt notifications to send users an attachment.
October 22, 2008: Gmail released the first application for the Android operating system, launched on the T-Mobile G1.
11/11/2008: Gmail users can video chat services right in their Inbox.
January 27, 2009: The Gmail Offline service launches, enabling users to access their inbox even when on the plane or in places where there is no network connection.
March 19, 2009: Google introduces ' Undo Send ' feature in Gmail, allowing users to retrieve email if they really do not want to send it.
7/7/2009: Gmail is officially no longer in beta.
August 30, 2010: The 'Priority Inbox' feature makes it easier for users to manage email.
February 10, 2011: Gmail users are more secure thanks to the free ' 2-step verification ' feature.
November 1, 2011: Gmail and some other Google services were redesigned with a new interface.
November 16, 2011: Gmail released version for iOS operating system, helping iPhone and iPad users can check Gmail easily.
April 24, 2012: Gmail's storage capacity is raised to 10 GB.
June 28, 2012: The number of Gmail users worldwide reached 425 million.
June 30, 2012: Gmail's video chat feature has been upgraded to support up to 10 free chat users at the same time with the launch of Google Hangouts service.
November 19, 2012: Gmail supports a total of 57 languages.
November 27, 2012: Removing the attachment feature, Gmail now allows users to insert files into the Google Drive cloud service, supporting capacities up to 10 GB.
March 28, 2013: Gmail users experience new compose features on multitasking platforms.