[Ologn]

I have a Google Pixel and Google Daydream and am an Android programmer.

If you have these things you can go into Google's Daydream store and download some Daydream apps, free or paid. I have done so and virtually every app has a logo somewhere said made with Unity. Each app seems to be multi-platform - it is made with Unity, and exported to Google Daydream, Oculus, Gear VR etc.

I programmed a basic OpenGLES shape in Android Studio for Daydream, but there was a lot that was lacking. I suspect most people will use Unity, and target the various VR platforms.

So in general, the answer is you need a platform Unity is on. Which in production is MacOS and Windows, although they have a Linux beta from what I understand.