This competition is an in-class competition for the course "Artificial Intelligence and Machine Learning (Spring 2019)" in Renmin University of China. The competition is to predict the overall rating for an Apple iOS App, whether above four stars (when we think the App is successful) or not. Acknowledgements We thank Ramanathan Perumal for providing this dataset. The data was extracted from the iTunes Search API at the Apple Inc website around July 2017.