On 17 October 2012, Shuttleworth announced that Ubuntu 13.04 would be named Raring Ringtail and said about this release "[In the next six months] we want to have the phone, tablet and TV all lined up. So I think it's time to look at the core of Ubuntu and review it through a mobile lens: let's measure our core platform by mobile metrics, things like battery life, number of running processes, memory footprint, and polish the rough edges that we find when we do that."
The Wubi installer was dropped as of 13.04, due to its incompatibility with Windows 8 and general lack of support and development. Previously, on 29 October 2012 at the Ubuntu Developer Summit registration, there had been a discussion of redesigning Wubi for Ubuntu 13.04.
Ubuntu 13.04 was released on schedule on 25 April 2013.
In reviewing Ubuntu 13.04 Jim Lynch from Desktop Linux Reviews said, "I found Ubuntu 13.04 to be a slightly disappointing upgrade. While there are definitely some enhancements in this release, there's also nothing very special about it ... Alas, there's nothing in Ubuntu 13.04 that makes me want to consider it for use as my daily distro. Don't misunderstand me, there's nothing overtly wrong with Ubuntu 13.04 either. It installed and performed very well for me. Unity 7 also has some helpful and attractive updates that Ubuntu users will enjoy, and there are other things in this release that help improve the overall Ubuntu experience ... I suspect it is simply because Ubuntu has settled into a comfortable middle age, it works and it works very well for what it does."
Support for Ubuntu 13.04 officially ended on 27 January 2014.