You have a great idea for an app or an online service. You're going to be super rich and conquer the world, all the girls would want you and all the boys would want to be you, it's going to be so awesome and mom's going to be so proud, unless... someone have already done that before you.

Let's face it - right now, while you're wasting time reading this blurb, it's either someone have already implemented your idea, or they are in the the final process of releasing it. That's why apps, and digital products in general, need to be built and out in the market fast. Like lightning fast.