The need for utilizing mobile-based technology to boost operational performance is increasing. Numerous researchers have proved the efficiency of mobile-based technologies to assist operational performance. Hence, this study looked into the boat manifest registration for Corcuera's passengers, which is still done manually. This kind of system is very time-consuming for the passengers due to the need to wait in a long line. This study aimed to develop e-Reserve, an Android application, that allows passengers to check boat availability, reserve a passenger manifest slot online, and be notified about boat trip schedules and cancellations through a system that can generate alerts and send notifications to corresponding recipients efficiently by integrating Firebase Cloud Messaging and in-app notification. In developing the mobile application, the researchers used agile model, as it is flexible with system requirements. Based on the results gathered using the user acceptance testing, all 31 respondents gave the same response: they all approved that the menus of the application met the expected output without bugs or errors as they tested the application. In light of the findings, the proponents conclude that the e-Reserve application has met the project requirements and passed the testing stages.