I downloaded the free version first of course, and yes, popup adds and in app purchase prompts on EVERY video played was extremely unprofessional and annoying; HOWEVER, I was able to see that it would play the movies I had recorded on my iPhones over the years and made them feel like I was sitting in the prime seating at Ceasar Palaces Omnimax (IMAX dome theatre). Especially on an HD .mov shot on iPhone 6 plus in zoomed in mode. This enabled head tracking for portions off screen on cardboard. Overall awesomeness!
DaveOnTheHill about VRPlayer Pro : 2D 3D 360°Video