I need a unified app that lets small- and medium-sized health facilities ditch paper and manage everything from triage to pharmacy on iOS, Android, and the Web. The core workflow is simple: outpatient data are captured once, tied to a phone-number-based unique patient ID, and then flow automatically into longitudinal records and a weekly disease-surveillance report. Each user interacts only with what matters to them. Doctors get a fast OPD screen and immediate access to past visits; field staff handle follow-ups and community visits; pharmacists see dispensing queues and an automatically updated stock ledger. Behind the scenes, view, edit, and admin permission layers keep data secure while still letting supervisors correct entries or generate analytics. The pharmacy module must predict reorder quantities and flag looming stock-outs by analysing real-time consumption. An investigation module should log lab work and feed its results back into the same patient timeline and the disease-trend dashboards. What I’m looking for you to deliver: • A responsive Web app plus native-feel iOS and Android builds sharing a single codebase • Secure backend with phone-based patient indexing, role-based authentication/authorisation, and audit logs • Automated weekly report generator (PDF/CSV) covering case counts, lab results, and stock usage versus forecasts • Source code, deployment scripts, and a concise technical/user handbook Acceptance criteria: the same patient record must be visible and editable (respecting permissions) across all three platforms; weekly surveillance files generate at a scheduled time without manual triggers; and the pharmacy predictor maintains ≤2 % stock-out rate in simulated data.