A 100% offline, free, open-source COPD self-management app. 11 modules: pulmonary function, symptom scores (CAT/mMRC), SpO₂, medication, exercise, nutrition, exacerbation tracking, comorbidity, smoking cessation, sleep. All data stays on your device via SQLite — zero upload. Features OCR report scanning, trend charts, smart reminders, and JSON export. Built with React Native + Expo.