I need a full-featured mobile application that pairs with our smart weighing scale over Bluetooth Low Energy using the official SDK supplied by the device manufacturer. Once connected, the app must pull the complete data packet—roughly twenty-five body composition metrics such as weight, BMI, visceral fat, muscle mass, water percentage, etc.—and present it in a clean, intuitive interface. Platform scope The project covers both iOS and Android. I am open to whichever native or cross-platform stack you feel delivers the best Bluetooth performance and long-term maintainability; Swift + Kotlin or a shared codebase in Flutter / React Native are all fine as long as you can meet Apple App Store and Google Play requirements. Design There are no fixed brand guidelines, so you’re free to propose a modern, health-centric look and feel. I’m after a light, uncluttered UI that makes it easy to read each parameter at a glance and offers simple charting or historical views for returning users. Core requirements • Implement Bluetooth pairing and data retrieval strictly through the vendor’s SDK and comply with its documentation. • Parse and display all 25 body metrics accurately. • Provide a summary dashboard plus a detail screen for each metric. • Store readings locally and sync to an encrypted cloud backend of your choice (Firebase, AWS Amplify, or similar) so users can access their history from multiple devices later. • Build for both iOS and Android, fully tested on current OS versions and at least one major version back. • Prepare the codebase and assets for App Store / Play Store submission, including any required privacy disclosures for Bluetooth and health data. Acceptance criteria 1. Successful pairing with the scale on both platforms within 10 seconds. 2. All metrics match the test values supplied in the SDK sample app. 3. No crashes or memory leaks after 100 consecutive measurements in QA testing. 4. Passed review builds uploaded to TestFlight and Google Play Internal Testing. Deliverables • Complete, well-commented source code • Build scripts / CI configuration (if used) • Brief setup & deployment guide • Signed APK / AAB and iOS archive ready for store submission • UX mock-ups or prototypes for approval before development begins I’m ready to share the SDK package, protocol docs, and sample payloads as soon as we start. Let me know your proposed tech stack, timeline, and any past BLE projects you’ve shipped, and we can move forward quickly.