Applebot is the web crawler for Apple, used by products including Siri and Spotlight Suggestions. It respects customary robots.txt rules and robots meta tags. It originates in the 220.127.116.11 net block.
User-agent strings will contain “Applebot” together with additional agent information. For example:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_1) AppleWebKit/600.2.5 (KHTML, like Gecko) Version/8.0.2 Safari/600.2.5 (Applebot/0.1)
If robots instructions don't mention Applebot but do mention Googlebot, the Apple robot will follow Googlebot instructions.
Will AppleSearch be 'a feature Apple users want', 'a Google Killer', or 'the Rise of Siri'? You decide...
This whole thing is wildly inaccurate. Rounding errors, ballot stuffers, dynamic IPs, firewalls. If you're using these numbers to do anything important, you're insane.
What makes any one set of browser share statistics any better than any other?
Often statistics are used as a drunken man uses lampposts -- for support rather than illumination.