With Qt 5.3 a lot of effort was put into enhancing the overall quality and user experience across all the platforms. Qt 5.2 introduced a completely new dimension into cross-platform: the mobile platforms and it has been downloaded an amazing amount of more than 1 million times!
Based on feedback and experiences from Qt 5.2, a lot of effort went into polishing all parts of the product including:
Improved first-time user experience through better documentation and examples. This is an on-going project, but already for 5.3 usability tests for the tools, installers and documentation were done and the issues that were found have been addressed.
Added Qt Positioning API support for Android and iOS. Use the GPS directly from convenient Qt APIs!
Qt Bluetooth API has now support for Android as well
Printing support for Qt has been greatly enhanced
Qt 5.3 ships with Qt Creator 3.1, which also introduced a lot of enhancements and stability to existing features as well as an initial support for WinRT tooling, a new clang-based code model and improved Android tool chain integration.