The objective of this project was to design a Real-Time Cellular Packet Data (CDPD) Network Application Performance Monitor (NPM). A performance evaluation of the CDPD network was accomplished using the NPM and the results of this analysis were presented. Various benchmarking efforts and system performance analysis techniques were examined and incorporated into the software design of the NPM. Experimental throughput and response time data were gathered using the software tool on an actual CDPD network with one and two mobile subscribers. The experimental results reveal an upper bound on the performance of the CDPD network as well as the performance degradation with the addition of another CDPD user on the network.