The SQL Server Data Tools team is pleased to announce an update for SSDT Preview is now available. The SSDT Preview update for April 2016 added support for the latest updates of SQL Server 2016 RC3, various bug fixes.
Get it here:
Download SSDT April 2016 Preview for Visual Studio 2015 and Visual Studio 2013
The version number for the latest preview in Visual Studio 2015 is 14.0.60413.0
The version number for the latest preview in Visual Studio 2013 is 12.0.60413.0
Download Data-Tier Application Framework April 2016 Preview
The version number for the latest preview is 13.0.3293.1