If you don't have a Gear VR yet but want to see what all the buzz is about, Samsung's Milk VR app will give you the virtual reality experience even without the headset—of course, it won't be the same as accessing VR content on a VR headset but it's a start. The Milk VR app will let you browse through all the 360 content Samsung has available, play these videos on the phone, or download them later when you do get your Gear VR. However, to access interactive videos, you'd need the touchpad on Samsung's VR headset, and thus the actual unit itself. And the app only works for owners of the Samsung Galaxy S7, S7 edge, Note 5, S6, S6 edge, and S6 edge+.
Source: Android Police | Download: Google Play Store (Free)