I'm not going to build this because I looked up asthma search count a while back and didn't like what I saw. There is another chronic disease with far more searches and a lot more competing software. I'll be building for that soon, and though I won't explicitely say the name anyone who is interesting in pursuing the niche should feel free to.
But following on your own theory, if it is trivial to clone the concept on to something related then you'd have to do both anyway. After all, changing the concept and marketing it for two or more different diseases is exactly what you are advocating, and doing it only for a single disease would be the opposite!
Yeah, but I'm not going to waste my time on an area with no market, even if it just a little time. I start off with the high market thing, if it works I can modify to enter the smaller markets, but I test on the most likely first.
