In Blender, you can choose an HDRI and adjust its strength and rotation for the viewport, but those settings aren't automatically applied when you render. World Apply adds a single button that syncs the viewport world settings with the scene world settings, keeping the viewport and final render consistent.
The add-on is compatible with Blender 4.2 LTS and newer and is released under the GNU General Public License v3.0 or later. It requests one permission: read access to HDRI files stored in Blender's directories. At 2.8 KB, it's a small download, currently at version 1.0.1.
World Apply stands out in the Blender Extensions library for tackling a specific, recurring frustration with a minimal footprint. It ranks 333 there, with more than 11,000 downloads and a 5.0 rating across 7 reviews.