Android application rejected

I got this email from Envato review team.

Thank you for your submission. We have completed our review of “Android WebView App” and unfortunately we found it isn’t at the quality standard required to move forward, and you won’t be able to re-submit this item again.

Here is the comment from your Envato Quality team reviewer:
This item has a nice concept, but doesn’t feature the required functionality and features to be approved as a premium item.

But many similar product exists in marketplace with less feature I offered. I don’t have much option to increase more features. How those got approval? What should I do now?

Product demo: