How to monitor new followers of other people's Instagram profiles?

Question

Parsing

Hey! For the 2nd week I have been looking in RuNet and abroad for a service or program / application for monitoring NEW subscribers of other people's Instagram profiles.
For VKontakte, there are services that show new subscribers to the group and accounts, but for Instagram I didn’t find it
Please tell me I’m
interested in the list of accounts that subscribed to accounts A, B, C, etc., preferably with a calendar (on Monday X, Y subscribed to account A , Z, etc.).

Answer 1

This function is called a spy, in my opinion it is in instasoft and in a bunch of other software

Answer 2

All this and more is on this site:
Monitoring new followers of other people's Instagram profiles