PostgreSQL (relational) or MongoDB (flexible listings). MVP Development: build the "core loop" (list, search, buy). Quality Assurance: test for bugs and payment security. Launch & Scale: submit to App Store and Google Play. Critical Factors
Building a buy-and-sell app (like Craigslist, OfferUp, or Facebook Marketplace) requires balancing user trust with a seamless browsing experience. Core Features verified accounts with ratings and history. how to create a buy and sell app
integration for secure transactions (Stripe, PayPal). Push Notifications: alerts for new messages or price drops. Technical Roadmap PostgreSQL (relational) or MongoDB (flexible listings)