While development of Windows Phone and Windows Store modern apps is a very exciting process, common wish among developers is to deliver their apps to the users as soon as possible. Just like developers, Microsoft is also caring deeply about users and their experience, so every app submitted for certification and publishing to the Store, goes through detailed security and usage testing, in order to ensure that it meets certification criteria, or simply said, that it works as advertised.However, during the development process, and especially during the process of publishing developer's first app, many Store requirements are overseen, which leads to the certification failures and developer frustration. You know that feeling when you have to publish your app to the Store by certain deadline. During the session, you'll be able to learn more about common mistakes during process of Windows Phone and Windows Store app certification process, along with plenty of tips on how to avoid them. If you're having troubles with certification of your apps or you're about to publish your first app, this is the session for you. By investing time in this session now, you’ll save your time when publishing later.