From the developer: "The professional edition of Robot-Manager adds the ability to analyze your web site log files for search engine and other types of spider visits. You can process your log file either on your local hard disk, via an ftp server, or through Telnet. Windows, Linux (Unix), and Mac ftp servers are supported. Log files can be compressed in either gzip or compress formats. Comprehensive reports on spider visits and pages indexed are available that can be printed. Spider visit data can be exported in a multitude of formats, including the ip address so that they may be included in other log analysis software."

Note: The trial edition is limited to working with 5 spiders for the robots.txt file and processing 100 page visits from search engine spiders.