Secure Parenting App Development

I need a mobile app that lets parents and other approved adults stay connected around a child’s daily life while keeping every piece of information absolutely private. The key functions are:

• End-to-end encrypted sharing of photos, documents and real-time messages.
• A daily activity log where caregivers can record meals, naps, milestones or notes straight from their phones.
• A hardened server you set up (cloud or on-prem) that stores all content securely, with encrypted file storage and a clean API the app consumes.

Account creation should allow role-based access so only invited users see the child’s data. Push notifications for new posts are a must, and I want the option to export an activity log as a PDF or CSV.

Feel free to suggest the best stack—Flutter, React Native, native iOS/Android, Node.js, Django, Firebase, AWS, etc.—as long as it supports strong encryption, scalable storage and straightforward maintenance.

Deliverables I’m expecting:
1. Fully functional iOS and Android builds in TestFlight/Play Console.
2. Secure backend code, database schema and deployment scripts.
3. Source code with comments and a short hand-off guide so I can run future updates.

If you’ve shipped privacy-focused apps before, especially anything involving encrypted media or compliant data handling (GDPR, COPPA, HIPAA or similar), I’d love to see it.