UC Browser is an alternative web browser for your iPhone, specifically designed for the Chinese market.
As far as alternative iOS browsers go, UC Browser is pretty attractive. It's cuter than Safari, supports tabbed browsing, and has some neat menus. However, UC Browser is in Chinese, with no language choice available. There is a version in English available here.
The biggest issue with UC Browser is that pages are optimized by the developer's servers, in a similar way to
If you're looking for an alternative to Safari on iOS, Opera Mini or
UC Browser is an app that is really only suitable for usage within China, as its web page rendering and limitations mean it compares badly to Safari and others.