If it's not an app anyone can try (this are not only social apps - we can try anything we can download or use over the web), than you obviously cannot get user

If it's not an app anyone can try (this are not only social apps - we can try anything we can download or use over the web), than you obviously cannot get user feedback from a very technically oriented community (which is usually a great feedback). That doesn't mean you cannot describe your solution, the business idea behind it, the way you designed and implemented it, the way you plan to distribute it, get users, and in the end make some money while making the world a better place - either for everyone, or just for yourself. Be it here or through a blog post. You can probably get some very useful suggestions from this sort of info, maybe even find somebody in the same area of business as you are. It would certainly be nice to hear and read more about different types of startups.