The User Agent (UA) in Chrome for iOS is the same as the Mobile Safari user agent, withCriOS/<ChromeRevision> instead ofVersion/<VersionNum>.
Here’s an example of theChrome UA on iPhone:
Mozilla/5.0 (iPhone; CPU iPhone OS 10_3 like Mac OS X)AppleWebKit/602.1.50 (KHTML, like Gecko) CriOS/56.0.2924.75Mobile/14E5239e Safari/602.1
For comparison, theMobile Safari UA:
Mozilla/5.0 (iPhone; CPU iPhone OS 10_3 like Mac OS X)AppleWebKit/603.1.23 (KHTML, like Gecko) Version/10.0Mobile/14E5239e Safari/602.1
When the Request Desktop Site feature is enabled, the UA is the same asDesktop Safari withCriOS/<ChromeMajorRevision> being added:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_5)AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/85Version/11.1.1 Safari/605.1.15