This app was mentioned in 1 comment, with an average of 1.00 upvote
Its been tried before, with limited results. (https://play.google.com/store/apps/details?id=edu.cmu.dv1.androidprod&hl=en) The biggest challenge is that there isn't much motivation for someone to go through the effort of doing all that is required of them, especially when the non-crowd sourced data is generally "good enough" for their purposes.