Apple has released the third beta for iOS 7 after two weeks. The release notes for iOS 7 beta 3 did not mention any significant changes or feature addition. It is mostly bug fixes and performance enhancements. There are some UI tweaks, especially when it comes to fonts and icons within apps on the control center.
Aurum3 NewTech , Apple Release iOS 7 Beta 3, Apple Release iOS 7 Beta 3