Hi there.
Thanks for a great app - just tried it out today, and weighing it up against Deo VR for use with Samsung Gear S7.
The zoom function is definitely faulty. It doesn't respond when you access it through settings, but only responds about 1 in 6-8 times of trying it. The other two view settings, vertical and tilt, respond immediately. It looks like it could be a simple coding fault?
From a fresh point of view, one other thing I found to be frustrating generally was how low down the video playback line was - I kept having to realign it as otherwise it as too low down for me to reach it. Maybe my chin's too fat :D But if you want to be able to quickly jump between scenes in videos, it's would help if the timeline was centred to field of view, and all the other options around it, imo. That's all the more important when there is already a 2-3 second delay due to the networking with the PC through WIFI.
I found these to be quite annoying issues in what is otherwise a great app, so much so that I can't commit to the Skybox app alone at the moment, but find myself weighing up pros and cons between yourselves and DEO VR with neither winning (due to their poor FPS rate).
Hope this helps - not having a moan, just hoping I can help make improvements (that suit me :D )