What type of connection are you looking for? I've not heard of Fologram before now, it sounds like it is primarily a viewer application with additional features. Could you give a few more details about what you're trying to achieve?
If you're using it just to view models, then the 3D viewer app on HoloLens could possibly work, if you can export your content as a .gltf file. If you're looking for more advanced features, then Unity + MRTK can get you functionality pretty fast if you have some dev savvy. I'm not aware of anything specific to Rhino off the top of my head though, other than then one you just mentioned. Is there something wrong with Fologram for your needs?
If you're looking for something that directly supports Rhino's own proprietary files, you may also want to ask Rhino themselves! However, Rhino is a pretty notable tool, and likely has a number of options for interop between different applications, you may want to look into what kind of export capabilities Rhino has too :)
