"it connects to the phone via high frequency sound"
It seemed neat but of all ways to try and communicate with the phone that seems more convoluted than bluetooth or a plug.
It's neat but some phones don't expose all camera features for third party apps so what would be the benefit of that vs just using the stock camera app and a control that works with it?
Or going with a cage and some moment lenses for video or some of the other grip and mount options?
I've seen some amazing phone work for photos and video so I can't criticize that aspect. I mostly use mine for night and widefield astro photos since it has star tracking and I don't have a tracking mount for my tripod so it's my best option.