Samurai Search is a free utility tool available for iPhone users, developed by Michael Rourke. This program allows users to search source code, plain text files, and PDF files directly on their iOS device or in various cloud storage options like iCloud, USB, or SMB. The main features include the ability to preview matched files and open them in preferred editing or viewing applications.

With Samurai Search, users can make use of flexible search options, including support for regular expressions in plain text files. The program also allows the selection of specific text file types or the option to specify a filename pattern for more targeted searches. Moreover, users can search files and folders from different sources such as On My iPad, iCloud Drive, or external file providers like SMB/USB folders, while retaining saved search files and folders within the app whenever possible.