Can I use my Visual Studio 2013 to build sharepoint add ins (Hosted App) or do I need to have VS 2015 and install Microsoft Office Developer Tools Preview 2 for Visual Studio 2015. Following the instructions here
For VS 2015, I suggest download office developer tools preview 1 by clicking
Once you have installed it, SharePoint Addins option wil start reflecting as follows and to create share point hosted Add-in select SharePoint Addins option from the following:
You have to install Office Developer Tools for building SharePoint Add-ins (Provider-hosted or SharePoint-hosted) or Office Add-ins.