In a recent project we ported over 50 cloud applications to Tizen. The list included all sorts of apps from text editors, spreadsheets and other productivity tools to graphics and creative programs to interactive games. While Tizen provides advanced capabilities and API for creating world-class applications, this project was not exactly a straightforward experience. We’ve discovered a lot about Tizen, which broadened our vision on developing cross-platform cloud applications. In this presentation we will share some of the lessons we’ve learned in the following areas: maintaining cross-platform compatibility, while taking the most out of each supported device and OS; conforming to platform guidelines and dealing with the certification process; optimizing user experience for Tizen; performance optimization; dealing with Web standards and features beyond the scope of the standards.