Yes

From what I've been able to tell, you can't do the actual mode changes from photos to videos directly from the app, but you can change from video to Loop and from photo to burst. The app will tell you which mood it is in, so you can tell how many times you've pressed the mode change button. The only options resolution wise, are 1080p and 720. I just bought one off Craigslist for about a hundred and thirty bucks.

It is actually an older one. I believe it was before the 2. The app is reasonably accessible, but not everything is. In particular, browsing images or videos that you have taken with the camera is not doable in the app with voice over. The camera has 3 buttons on it and an LCD display (which actually isn't very useful even for sighted people). The app allows you to adjust settings on the camera which would normally be done through the menus on that LCD screen. It also let's you start recording and you can check to see what type of recording you will get - video, photos, or a burst of photos.

I just got a GoPro Hero+ Wifi. Much of it can be controlled from the app, rather than having to use the controls on the camera at all. You would probably need some assistance getting things set up with the connection to the app in the first place, but much of the rest could be done from a combination of the app and using the three hardware buttons on the phone to power off or turn the wifi on or off.