CoSpaces currently works with any cardboard headset, such as the Google Cardboard or the Mattel View-Master.
There are two things, you should pay special attention to when deciding for a cardboard headset:
Will my phone fit in?
Large smartphones, for example, might not fit into the Mattel View-Master.
Does it have a button/hole?
You need to touch the screen in order to walk around in VR when using CoSpaces. If your headset has a button, this button will trigger a mechanism that touches the screen for you. Other headsets just have a little hole that allows you to put your finger through and touch the screen.
There are also headsets that offer neither of these possibilities. With these, you might not be able to walk around in virtual reality.
We are also working on bringing CoSpaces to Gear VR and Google Daydream.