Flutter Mobile App Frontend Build

I am planning a cross-platform mobile app and need the entire front-end built in Flutter (Dart). The scope covers roughly 80 screens—many are variations of the same layouts, but the UI must look polished and production-ready on both iOS and Android.


Please give me price front end first
Core features I already know I’ll need are:
• User authentication (traditional email-and-password plus social media log-ins)
• In-app purchases wired to the respective stores

While the full back-end will run on a separate desktop/server application, for this phase I want the Flutter side completed with clean, testable code, state management you are comfortable with (Provider, Riverpod, BLoC, etc.), and clear separation so my server team can later connect the APIs.

What I need from you:
1. A line-item estimate (hours or fixed) for coding the 80 screens—including navigation, auth flows, purchase flow stubs, and responsive tweaks.
2. A realistic timeline, highlighting any milestones you prefer (design hand-off, core navigation, auth integration, store purchase sandbox, final polish).
3. Confirmation of the toolchain you’ll use (Flutter SDK version, preferred state management, Git for version control).
4. A brief note on how you ensure pixel accuracy and performance (e.g., device testing strategy, widget reuse, lazy loading for long lists).

Acceptance criteria for hand-over:
• All screens compile with no errors or warnings on current stable Flutter.
• Dummy services simulate auth and purchase flows so QA can tap through every path.
• Code is pushed to my private repo with clear README and build/run instructions.
• Any custom icons, fonts, or images are included with licensing info.

Send your estimate and delivery schedule so we can lock the first milestone and get started.