Bulk Rename & Group is a free Android utility tool developed by Dire Studio that allows users to easily rename and organize multiple files at once. It offers a wide range of features to batch rename and group files from both internal and external storage, making file management a breeze.

The app's simple three-step process allows users to select input files, customize the operation using the provided features and options, and select the output path before starting the operation. Users can choose from a variety of available options to bulk rename files, including changing the base name, auto-indexing, capitalization, extension, trimming, removing, replacing characters, and adding prefixes or suffixes.

Bulk Rename & Group also offers the ability to group files by name, modified date, size, or extension. Users can customize the output by selecting the output folder, choosing to group or rename copies of the selected files, or seeing a preview of the output files before modifying them. The app also includes adjustable themes, font and thumbnail sizes, and a local and global search function.

Overall, Bulk Rename & Group is a handy tool for anyone who needs to manage files on their Android device, offering a simple and efficient way to rename and organize files in bulk.