Go back to your requirements and specifications and check that you have included everything that you wanted. These lists may have changed from your first ideas - that's all good! If you've missed something important go back and implement this.
Then it's time to try out your prototypes with real users to get feedback. Observe how they use the prototypes and learn what works and what doesn’t.
Your testing will have given you improvements to make to make your outcome even better. Focus on adding these to refine your product.
Your product is now ready for sharing with the world!