At some point you need to trust your developer and spill the beans on your app concept of the thing that the world desperately needs, and often when we hear these ideas, we agree!! It doesn’t mean to say the first developer or investor you tell is going to run away with your idea. The chance of that happening is incredibly low, even if it's a great idea. The power goes to you! it’s your dream, you are the most likely candidate to invest in it, in your circles. Don’t let it slip away though or you could easily miss your chance at being first to market and dominating the space. These ideas are becoming rarer by the day, as are those perfect domains that will stick in the brain of the consumers. Make a move, get the .com, get an outline/quote for the development, pen the steps and the predicted outcome, check the budget, payment processes and timelines and if it all balances out, get started!