So this will be my first pair of video glasses and so far they are a decent video recorder. When the description said "video only" I was a little disappointed but when they arrived I was pleasantly surprised these actually do record both video and audio, and decently I might add.
I also discovered that with video glasses, at least with these ones, these do not have any video stabilization like my current action cameras. So raw videos during play back are pretty jerky if you are moving around a lot. This may be reduced with some post video editing, but not the original video. So keep that in mind when planning on using these doing anything physical.
Also, where you look isn't necessarily what you're recording. As with any fixed camera on your head, where it's pointed is what it will record. So you'll need to be conscious about looking straight ahead (parallel with the glasses) every time you look in a different direction. Basically don't move your eyes to look, move your head, and you'll record what you're "looking at".
As far as the app in concerned I never downloaded it because these work fine just by themselves, without an app. Also I don't need anymore apps installed on my phone, plus I'm sort of paranoid about video apps for privacy reasons.
Anyway I just simply connect these to my computer with the included android to USB cord. By the way these work instantly with my Windows desktop as well as my Mac Laptop without any extra software. It's just like basically connecting a 64 GB USB stick and seeing the contents inside. And when you want to transfer videos just drag and drop them to your desktop.
As far as operation it's very simple. You turn it on and it instantly starts recording video and audio. Then when you're done recording you just turn it back off. This only has one button so it's all one button operation. Also when turning it on and off there is a vibration feedback so you know that's turning on and off. You can also take it off and make sure the red light isn't on in the right side.
And the only way to take a photo is while it's on and recording video. So while it's on and recording, you just press the power button once quickly and it takes a photo of what you're aiming the glasses at. There's no stop or start button, if it's on it's recording.
As far as the fit, I believe I have a normal head, maybe slightly on the thin side, so these are comfortable for me when wearing for a long time. They got a little warm after a long recording but not uncomfortable. These also don't look bad, but these won't win any style awards either.
With the thick frames and obvious small round camera lens right in the front, people will know this is a camera if they are close enough and looking right at you. If you're far enough it's not too obvious. Overall I'm pretty satisfied with these camera glasses. They will be useful in certain situations, just not so much in anything that I have to move around a lot, unless I move really slowly and smoothly.