Flutter Cosmetics Store App Build

I’m planning a full-featured cosmetics store built with Flutter for both iOS and Android. The core of the app is straightforward: customers browse an attractive catalogue, add items to their cart, pay securely, and leave ratings or reviews that appear in real time. I want phone-number OTP to be the one and only way users create an account and sign in; email or social logins can stay out of scope for now.

For payments, the checkout flow must support credit and debit cards alongside two local options—Vodafone Cash and InstaPay—so please factor in the necessary gateways or custom API work. If you prefer Stripe, Paymob, or another processor, let me know the pros and cons for these specific wallets.

High-level deliverables
• Flutter source code structured for easy maintenance and future scaling
• Modern UI/UX that highlights products, handles deep links, and adapts to tablets
• Secure phone-number authentication (OTP) with a service such as Firebase Auth or a comparable provider
• End-to-end purchasing flow with the three payment methods above, test environment included
• Review & rating module tied to each product
• Basic admin endpoints or a lightweight dashboard so I can upload new items, prices, and images without touching the code
• Build and submission guidance for both App Store and Google Play

Acceptance criteria will be a successful test build on my device, smooth checkout in sandbox mode for each payment option, and clean push to production stores. If you’ve launched Flutter commerce apps before, I’d love to see them and discuss your preferred architecture.