Production-Ready Cross-Platform Mobile App

I have a clear concept, wireframes and feature list for a compact yet professional mobile application and I’m ready to move straight into build. The task is full-cycle: native apps for iOS and Android, a secure backend, user accounts with email-and-password sign-in, push notifications, progress tracking, QA, store submission and post-launch support. Everything—source, designs, documentation and IP—will transfer to me under an NDA, with no reuse or resale elsewhere.

You are free to recommend the ideal stack (REST, GraphQL, Firebase, or anything you prefer) as long as it suits a scalable production environment. I’ll shortlist on the strength of your portfolio and how closely you can match similar end-to-end projects.

When you reply, please include:
• links to apps you have shipped that demonstrate comparable scope
• the technologies you would choose and why
• a high-level timeline with key milestones
• your fixed price for the full build plus a line item for ongoing support/maintenance

Deliverables on completion:
• iOS and Android binaries ready for App Store / Google Play submission
• full, well-structured source code in my private repo
• backend (code and database schema) deployed to my cloud account
• technical documentation and a short hand-over walkthrough
• 30-day post-launch bug-fix warranty

I’ll supply the detailed spec and design assets once we’ve signed the confidentiality agreement. Looking forward to seeing how you would bring this product to life.