Easy Digital Downloads Reviews:
Easy Digital Downloads Reviews extension makes it quick and easy for your visitors and customers to review the products offered on your website.
You can decide which products a customer can leave a review individually. You can also go ahead and decide who can leave a review and who cannot. Review submissions also include a moderation queue, giving store owners protection against spam and abuse. You can select verified customers, logged-in users, or everyone who can leave a review.
This will help you gain more conversions as customers believe reviews left by other customers for the product.