Keyless Car Entry Mobile App

I need a clean, reliable mobile application that lets drivers unlock and lock their car doors directly from their phone. The app has to run smoothly on both iOS and Android, sharing one code-base if possible to keep future maintenance simple. Security is paramount. Access to the lock/unlock button must be protected by built-in biometric authentication—Touch ID, Face ID, or each platform’s native fingerprint solution. No PINs or passwords; the user experience should be instant once authentication succeeds. You will be integrating with the vehicle’s existing keyless entry module, which communicates over Bluetooth Low Energy. I can supply the BLE characteristics and sample packets; you will handle scanning, pairing, and encrypted command transmission. Expect a lightweight backend or local secure storage for managing paired vehicles and revoking keys. Deliverables • Production-ready iOS and Android apps (TestFlight / Play Console builds) • Well-commented source code in a shared repository • Brief setup and usage documentation Acceptance criteria • Car doors consistently lock/unlock within 2 seconds over BLE at a 3 m range • Biometric guard triggers every time the app comes to the foreground or the user presses the command button • No logged crashes in a 24-hour automated stress test on both platforms If you have previous BLE or automotive app experience, mention it—otherwise show me a small proof-of-concept plan and timeline so we can get started right away.