Web App Development for Consumer Platform, preferably wordpress

I am developing an app with multiple phases. Phase 1 — Web App Marketing website Consumer web app — registration, login, deal feed, category filters, radius settings, follow businesses, push notifications via FCM Business dashboard — deal posting form, QR code generation, Stripe subscription billing, basic analytics Admin panel — manage businesses, verify listings, platform-wide analytics UTM tracking infrastructure — GA4, Meta Pixel, Google Tag Manager, conversion events, UTM capture on sign-up forms Two full iterations with revisions plus complete handover package Phase 2 — Location Engine Server-side geofencing engine with spatial queries Real-time deal broadcasting via WebSocket or Server-Sent Events Push notification infrastructure — FCM, sub-60-second delivery, deduplication logic, follower priority Load testing — 500 concurrent users, 100 simultaneous live deals Post-deal summary email system Phase 3 — Native Mobile App React Native iOS and Android app — full consumer experience ported to native Background location tracking Native push notifications — APNs (Apple) and FCM (Google) Deal map view, offline cached feed, smooth onboarding App Store and Google Play submission and compliance TestFlight beta distribution 30-day post-launch bug fix support Phase 4 — AI Suggestions Engine Historical deal data layer Pattern recognition and comparison engine LLM API integration (Claude API) for generating personalised suggestions Post-deal email template with AI suggestions embedded Automated trigger within 1 hour of deal expiry Fallback logic if API times out