Primary paper: Characterizing and Detecting Performance Bugs for Smartphone Applications (ICSE'14)
Optional paper: Taming Android Fragmentation: Characterizing and Detecting Compatibility Issues for Android Apps (ASE'16)
Review length: 400-500 words (don't copy any sentence from the original papers!)

Your review should have the following paragraphs for the primary paper:
• Paper summary: state main contributions in 2-3 sentences
• A list of strengths and limitations: give a honest evaluation of the paper (main part); you can comment on the problem (e.g., is it important), approach (e.g., does it have enough technical contribution), evaluation (e.g., are the subjects and metrics reasonable), and results (e.g., is there enough improvement over state of the art?)
• Potential future work: give your own idea(s) for further advancing the research in this direction
• Two (important) questions about the paper that you still could not get the answer after reading it (if any)

Your review should also briefly discuss the optional paper with the following additional paragraphs:
• Summarize the main contributions of the optional paper in 2-3 sentences  
• Relate the two papers: what is the connection between the primary and optional papers