Good job. What's more interesting many HN hackers (including me) thought about the concept or build similar products some time ago. But it take guts to stick with a product and find a way for monetization. The same applies to WhatsApp / Flappy Bird / Instagram / etc., anyone could replicate their idea or had better product before them (ex. ICQ, Jabber, etc). But it take guts to stick with product and monetize it. Sometimes I regret that I'm tech guru not a business guru..