The Dynamic Visibility extension allows you to hide any widget. It is particularly useful when you are building something that you don’t want to show everyone.
Disable or enable a whole row or single widget;
Based on a time limit:
Set a start date and an end date;
Set days of the week;
Set a visible Time FROM/TO;
Show if the user is logged in;
Show if a user has a specific role;
From the new version
Remote IP;
Browser;
Context: CPT, Page/Post, Term, Meta;
Conditional Logic: Conditional Tags for Post, Conditional Tags for Site, Special Pages, Archive.