I understand your concern, but Code Review is unfortunately not the place that you are looking for.
I would recommend asking among your friends, on Twitter/Facebook, or on Reddit.
Or you could propose a new Stack Exchange site for "Software Reviews". Or take a look at the existing related proposals:
Out of these, Website Review sounds like what you are primarily looking for. So go ahead and contribute to the proposal. Follow the proposal and ask example questions, and recruit additional followers, to help it reach the next phase!
Although be aware that as it currently seems, it is unlikely that there will be such a Stack Exchange site. This is because Stack Exchange sites does not like to be dependent on third party links, something which seems unavoidable for this kind of site. On Code Review we work around this problem by forcing the code to be reviewed to be inside the questioninside the question.
On Code Review, it's the code that is in focus. A feature-request can sometimes be a part of a review, or added as a comment (but are not the primary focus). But to get such reviews/comments here, you need to post an on-topic question, which needs to include code.