I recently come across the concept of pretotyping. It isn't a misspell, I really meant pretotyping and not prototyping. A formal definition from the book:
Testing the initial appeal and actual usage of a potential new product by simulating its core experience with the smallest possible investment of time and money.
A less formal definition:
Make sure as quickly and as cheaply as you can that you are building the right it before you build it right.
I should have read that before start working on Opinoid. Still, it's not too late to rework it. I think the book is worth reading by everyone working on new ideas and you can get it for free or for very cheap money from Amazon or at http://www.pretotyping.org/pretotype-it---the-book