How not to miss a single message in your VKontakte group?

Question

In contact with

Hello!
We have a VKontakte group with many posts, and it happens that a user asks questions commenting on some very old post.
The question is - how not to miss a single such message in your group in contact? Maybe there is some kind of ready-made solution, application, informant?
Thank you!

Answer 1

It is necessary to extract comments to your public via API and compare them every day with the previous one, if there are changes, then inform you.