The newest name sits at the top
A following list by itself tells you who, never when. Susly sorts it by time, so the account they followed this morning is the first one you see.
Unfollows remain on the record
When a name drops off their list, it's gone from Instagram with no trace. Susly keeps it on screen and marks it as unfollowed.
One username, nothing to download
Susly opens in the phone browser you already have. You type their handle, and you never log in to Instagram to do it.
From one handle to the complete list
Enter the @username of the account you're curious about.
It looks at that account's following list and puts the names in order by when they arrived.
The newest follows come first, and anyone they dropped has an unfollowed mark.
What it won't do
Susly works from follows and unfollows. It won't read anyone's messages, and it can't get past a private account's follower approval, the gate Instagram puts on accounts set to private.
No account to set up, it runs on iPhone and Android browsers.