This document compares the performance of applications built with two cross-platform frameworks, PhoneGap and Titanium. It first provides background on hybrid mobile applications and the two frameworks. It then discusses related work comparing native and hybrid performance. The document proposes comparing the two frameworks' applications based on execution time and disk space. It presents the implementation of a sample RSS feed app with both frameworks. Analysis shows the PhoneGap application has shorter execution times and uses less disk space than the Titanium application. Overall, PhoneGap applications perform faster for the tasks tested.