Smartphone App Development Sprint -- 2

I’m ready to kick off a new smartphone app and need an experienced developer who can take the concept from idea to functional prototype. The focus is strictly on smartphones for this first release, though the architecture should be flexible enough to expand to tablets or wearables later.

Here’s what I’m looking for:
• Requirements-gathering session to lock in user stories and core features
• Wireframes or visual mock-ups that clearly map each screen and user flow
• An initial Android and/or iOS build (we’ll decide together which platform launches first) that demonstrates the main functionality, clean navigation, and solid performance
• Source code, project files, and brief setup documentation so I can compile the app locally
• Two rounds of feedback-driven refinements to polish UI, fix bugs, and optimize load times

Preferred stack: React Native or Flutter, but I’m open if you can justify another approach that speeds development without sacrificing quality. Integrations may include RESTful APIs, Firebase, or similar back-end services—please highlight your strengths there.

If you’ve shipped consumer-facing apps before, especially ones that balance smooth UX with efficient resource use on mobile hardware, I’d love to see them. Let’s build something lean, performant, and primed for future growth.