In the recent years, online traffics generated by mobile devices have been gradually surpassing other channels (e.g. laptops/desktops). Mobile app development is constantly evolving and changing, with bigger and better apps being introduced to the app market play on a daily basis. In 2018, we have witnessed a significant shift from native to cross-platform development and the rising in popularity of Progressive Web Apps. Additionally, latest advanced technologies such as machine learning, artificial intelligence, AR, VR and blockchain also contribute to keep mobile app development growing stronger. The advancement of those technologies are coming to a stage where mobile apps can be developed for real-life purposes by incorporating directly such technologies in to the applications. Here are some of the highly expectations for app development industry in 2019.