Because Granny Viewer is a niche developer tool, it is rarely hosted on official "app stores." If you are searching for a download:

For technical users, the property grid is a goldmine. It displays every piece of metadata stored in the file: vertex counts, triangle counts, material names, texture paths, compression settings, and custom application data. This is invaluable for reverse engineering unknown file formats.

A new mode, GrannyRescalePose() , was introduced in the 2.11.10.0 update to preserve bone lengths during animation retargeting, solving issues where bones didn't rotate consistently with their children.

A hierarchical menu for all commands, including action buttons (blue), toggle buttons (red/green), and mode buttons (orange when active). View Pane: