User Agents

Mozilla/5.0 (iPhone; U; CPU iPhone OS) (compatible; Googlebot-Mobile/2.1; http://www.google.com/bot.html)

This user agent string belongs to Google Bot Mobile, which is a library used to perform HTTP requests (more often, in the automatic mode as a web crawler or bot).

Browser
Name Google Bot Mobile
Version 2.1
Developer Google Inc
Type Bot/Crawler
Device
Type Mobile Device
Capabilities
ActiveX Controls No
Background Sounds No
Cookies No
Frames No
Iframes No
Java Applets No
JavaScript No
Tables No
VBScript No
Properties
RSS Reader No
Fake No
Crawler Yes
Anonymized No
Mobile Yes
Tablet No
Modified No
Beta Version No
Alpha Version No
CSS Support
CSS 1 No
CSS 2 No
CSS 3 No
CSS 4 No