How to make RSS from VK wall?

Question

RSS

I have tried many services. I want it for free)) Well, or inexpensively. I found the most adequately working one in vkrss.com, the rest either with a file, or do not work at all. Share your experience, please.
At the output, I want to get a single link to RSS, where there will be many streams from different VK groups, including closed ones

Answer 1

feedfry.com