This study aimed to design, develop, and evaluate an Android-based Strategic Intervention Material (SIM) for Grade 6 Science using an innovative AI-powered authoring system called the Tudlo Editor. Grounded in the ADDIE instructional design model, this research addressed the critical gap in digital learning resources for least-mastered science competencies in Philippine public schools. The developed application, "Ninja Quest: Unraveling the Secrets of Vertebrates and Invertebrates," integrated gamified activities, multimedia elements, and offline accessibility features to enhance learner engagement and conceptual mastery. Evaluation results from 60 science teacher-experts across six public elementary schools in Davao City demonstrated a very high level of acceptability with a grand mean of 3.88. The study confirms that iterative development through the Tudlo Editor can significantly improve instructional material creation efficiency, while the Android-based SIM represents an effective, scalable solution for supporting inclusive and engaging science learning in resource-constrained educational environments.