There are a lot of VR headsets out there. Spec VR supports any type of Google Cardboard headset on both Android and iOS devices. To configure Spec VR with your VR headset tap the 'cog' icon in the top right when in the VR view (split screen) and change the VR headset option to the one you want to use.
We are currently optimising the Spec VR experience for Spec VR Clips hardware because they are more portable / flexible than other headsets on the market and provide a plug and play experience.
We haven’t tested the full breadth of VR headsets at the moment but we are definitely eager to hear your experiences if you have some to share. Please contact firstname.lastname@example.org if you think we should support a specific headset and it might make it into our roadmap.