Eastern Visayas State University Carigara Campus (EVSU-CC) is a beneficiary of the Philippine National Aquaculture Program (PNAP), specifically the creation of Community-Based Multi-Species Hatcheries (CBMSH) funded by the Bureau of Fisheries and Aquatic Resources (BFAR). The primary objective of this study was to develop an online hatchery monitoring and feeding management system for Nile Tilapia using an Android-based automated feeder device equipped with a short messaging service (SMS) feature that notifies the administrator and farmworker of the auto feeder's status. The Waterfall methodology - a life cycle approach to software development - was utilized to construct the online monitoring and feeding management system. The researcher used a survey questionnaire with 30 respondents from EVSU-CC personnel and hatchery on-the-job trainees to determine the system's competence to monitor the hatchery online, release feed as scheduled, and notify the user of the auto feeder status. The data were analyzed using the Likert scale and the T-test (one-sampled statistics). The result shown that the system is capable of monitoring the hatchery online, dispensing feed according to schedule, and notifying the user through SMS of the auto feeder's status. The hatchery management will benefit from a decision support system, which will reduce human mistake and significantly enhance the quality and quantity of tilapia produced.