With around 4.5 million users, Fling still has a long way to go before it rises to Snapchat’s level, but it has the potential to do just that. How the app works is, whenever you find yourself wanting to share a “moment” with the world, regardless of what it is, you just snap a picture of it and “fling” that picture to anywhere from 50 to 500 randomly selected Fling users. Once these users see your moment, they can reply to it using “reactions,” which act as a feedback system that you can sift through to see how people responded to your moment. It’s an interesting idea that’s strengthened by how well-designed the app is, which is why the British company that develops it was able to raise $20 million in funding recently.