Cross-Platform HMS Certification & Fixes

I need to bring our in-house Hospital Management System up to full certification standards while clearing out the bugs that users keep hitting. All major modules—patient registration, appointments and billing; doctor, staff and pharmacy management; plus every report, certificate and background routine—must work flawlessly. The same codebase runs on Windows workstations, Android phones/tablets, and iOS / macOS devices, so each fix has to be tested end-to-end on all three environments and packaged for a smooth release. Once stability is confirmed, the project moves straight into the certification phase, with any compliance notes or documentation you prepare folded back into the main repository. Deliverables • Clean, tested builds for Windows (installer/MSI), Android (APK or AAB) and iOS/macOS (IPA/App bundle) • A concise bug-fix log mapping each issue to its resolution • Updated technical documentation required for certification submission • Sign-off report confirming that every listed module passes functional and cross-platform checks Acceptance criteria 1. No critical or high-priority defects reproducible in the certified builds on any of the supported devices. 2. All listed modules operate consistently across the three platforms with identical data results. 3. Documentation is complete enough to pass the external certification review without revision requests. Tools and languages aren’t locked in as long as the final builds satisfy the above criteria and stay compatible with our existing deployment pipeline.