My general recommendation would be to read Crossing the chasm. Pretty good read. General idea is to solve a problem for a very core group of users (you get th

My general recommendation would be to read Crossing the chasm. Pretty good read. General idea is to solve a problem for a very core group of users (you get that users by just basically hand holding them and signing them up one by one). Once you get 100% satisfaction from them, they'll likely tell their friends in that particular (and very narrow) domain. After winning in a particular domain 100%, only then move on to related domains. Once you get a bunch of domains within a larger set, than you go after that super set. Your problem here is your going after a rather broad group of people. That's usually pretty nigh impossible unless you got megabucks behinds you. I'd narrow it somewhat and tackle them first. I don't know anything about fashion so I can't help you there. But if it were, say, an app for people who were buying motorobikes I might first create an app that helped people of a particular brand (indeed, model within a brand) of motorbike as they often congregate and chat amongst themselves quite nicely. Once I completely killed with that brand, I might consider building the same tool for another other brand of motorcycle. After killing a bunch of brands only then would I try to go after the motorcycle market in general.