Smartphone and smart glasses manufacturers like Google, Apple and Microsoft are increasing the number of available devices with mixed reality features. The environmental understanding capability allows the developers to create a totally new kind of experience for the users using framework like ARCore, ARKit or Microsoft Mixer Reality Toolkit. They provide a deep merging between the virtual and the real world around us. It's easy to make mistakes so the users can feel uncomfortable living the experiences with our AR apps. In this workshop we discuss the best approach to design good user interfaces and provide a shine natural interaction for the user based on mixed reality paradigm.