User Agent

Mozilla/5.0 (iPhone; CPU iPhone OS 6_0 like Mac OS X) AppleWebKit/536.26 (KHTML, like Gecko) Version/6.0 Mobile/10A5376e Safari/8536.25 (compatible; SiteAuditBot/0.97; +http://www.semrush.com/bot.html)

This user agent belongs to Safari. Apple Inc developed this Browser. This Browser run on iOS and it renders web contents with WebKit on iPhone.

Browser - Safari

Safari

Version6.0 @ 32 bit
DeveloperApple Inc
ParentMobile Safari 6.0
Platform apple 6.0 (32 bit) by Apple Inc
Device TypeMobile Phone
More infohttp://www.semrush.com/bot.html

Act as 

Mobile Yes
Tablet No
Crawler No
Fake No
Anonymized No

Capabilities

Rendering EngineWebKit by Apple Inc (For Google Chrome, iOS (including both mobile Safari, WebViews within third-party apps, and web clips), Safari, Arora, Midori, OmniWeb, Shiira, iCab since version 4, Web, SRWare Iron, Rekonq, and in Maxthon 3.)
Pointingtouchscreen
Javascript Yes
CSS Yes Version: 3
Cookies Yes
Tables Yes
Frames Yes
IFrames Yes
Background Sounds No
Java Applets Yes
VB Script No
Activex No