As someone who is in the financial industry (creating investment models), it seems to me like the real product here you are selling is the Vuru grade. There are already plenty of other screeners out there -- I don't really need another (though I like your UI).
With that said, I would like more info about the Vuru grade and how it has performed. 10 yr, 5 yr, and 3 yr info isn't relevant anymore in the industry -- not without more information than you have provided. How many holdings per year? What's the turnover like? What's the peak to trough draw-down? How have the quantiles performed (e.g. how do those 90+ perform compared to those 10+)? If you showed me that since 2000, there is a linear relationship between the Vuru rank and annual returns, then it would be a product I could get into. On the other hand, if you show me that I have to buy the 900 stocks that are rated 90+, it's just another unrealistic academic portfolio.
My recommendation? Take the S&P 500, Nasdaq 100, and DJIA since 2000. Show portfolios on each made of 90+, <10, etc -- rebalanced annually and monthly. Show the number of holdings per rebalance period. What I want to see is that if I rebalance my portfolio of the stocks rated 90+ in the S&P 500 every quarter, how am I going to perform versus just the S&P.
I guess all I am trying to say is, please, please, please give me a REALISTIC portfolio and its performance (even if it is backtested) over the last 10 years and give me summary stats every rebalance period. I want to isolate the power of the Vuru grade and take out all the other noise around it.
Best of luck! I look forward to seeing how this evolves!