>>1325053literally this.
I don't mean to demean op by saying this thread is completely pointless (even though it's kinda close) but that should've been the to-go progression
idea > test > fail > test > fail > test > work > ship
at the moment it sounds very much that you're still testing and while seeking outside opinion can be worthwhile, it could also warp your vision. That's just me though; all of my personal projects were self-contained and based entirely on my creativity alone.
As for the product itself, I think it's a worthwhile idea, but it largely goes back to my first point. Read the other post suggestions sure, but go in the field and toss that shit out on a line, record results. If you came up with this in the first place, I'm sure you're more than capable to make adjustments to counter things that might go wrong on your own.