Anchor's market penetration comes from their ability to get users, press, and search results. Katha may have the same idea, an equally good cross-platform app, and a year head start, but that doesn't mean anything if the team couldn't get the word out.

Most tech founders hate this, but your ability to market your business is considerably more important than your product at the beginning. You can build the most amazing app in the world but if you can't get people to hear about it your startup will fail. Conversely, you can build something very average, but if you can get it in front of millions you'll probably succeed.

All that said though, didn't AudioBoo do sound-based social media years before both of these apps? It was quite popular for a while.