I’m building a consumer-facing mobile app that must run smoothly on both iOS and Android and weave finance and health utilities into one seamless experience. The core flow begins with a true “one-tap” sign-up/login powered by a third-party authentication SDK I’ll provide. Once inside, users land on a tabbed interface—each tab calling its own set of integrated SDKs and APIs. Health Metrics Tab A deep integration with another third-party health SDK will surface live heartbeat, SpO₂, sleep scores and AI-generated lifestyle suggestions. Data must sync continuously and display in clean, native charts. Payments & Cards • QR-based UPI: scanning any valid code should trigger PhonePe directly. • Full payment-gateway checkout for online purchases inside the app. • Card management plus NCMC card integration, including vendor APIs for wearable-card tokenisation. Wealth & Summary Assets, liabilities and transaction history need tidy dashboards, with server calls bundled for speed. Key expectations 1. Produce two stores-ready apps (Swift / Objective-C or Kotlin / Java / React Native / Flutter—open to your recommendation). 2. Wire up the supplied authentication and health SDKs, payment gateway, PhonePe intent flow, and all vendor endpoints. 3. Deliver clean, well-commented code, build scripts, and basic unit tests. 4. Assist through TestFlight / Play Console submission and handle initial bug fixes. If you’ve shipped similar multi-SDK, finance-plus-health solutions before, let’s talk timelines and milestones.