MONKr

1.get any file explorer on your VR

2.Install the apk

3.go to downloads in your file explorer

4.click on the apk file in your downloads folder

5.let the file load then ,click on install

6.click on ok/open

7.Go to "Unknown Sources" and click on MONKr

here´s a video tutorial if you didnt understand what i just wrote:

AND HAVE FUN!