One of the most difficult aspects of app development, particularly when launching a new product, is persuading users to check it out. One of two methods can be used to accomplish this:
1) Getting input from potential consumers and making changes to the product if they don't seem interested
2) Providing a monetary incentive to registrants. This might be in the form of early access, gift cards, or content sample in today's world. While you wait for this step of approval, another alternative is to offer your app free with advertisements (this is where most apps fail).