dwf viewer for ipad

I'm looking for a viewer for DWFs on an iPad.
I've found a few that say they allow you to view dwfs, but all of the ones I've found want to upload them to a cloud or Adesk 360.
That's a problem for us. With the type of project work we do, we can't use a cloud for confidentiality.
So is there a stand alone viewer for dwfs? I just want to load them on an iPad from my workstation and take them with me.
Any suggestions?
Thanks in advance.

Autodesk has several free ways you can view a DWF file without the need for their AutoCAD software. compatible with different iPad models.