I used your app and it seems like a nice idea. After accumulating a lot of ideas myself, I often have to go through all of them after while to reevaluate why I chose not to pursue them at that time.
For me a 1-10 scale is not how I like to answer the questions in your app. I prefer a simple passionate/not-passionate & expensive/inexpensive type answer instead.
Also a way to tag an idea would be helpful for sorting later.
I use wunderkit/wunderlist to track my ideas because it has a native desktop and mobile application. I'm not sure if I would be willing to use a web application to track my ideas.