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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.
Project ID: 40402108
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249 freelancers are bidding on average $579 USD for this job

Hi there, I’ll build a clean, reliable cross‑platform mobile app that securely unlocks and locks your car via BLE, with a single shared codebase for easy maintenance. The app will use native biometric checks (Face/Touch ID on iOS, fingerprint on Android) every time it comes to foreground or when you press the unlock/lock button, ensuring instant action after authentication without PINs. I’ll integrate with your vehicle’s existing BLE module, using the provided characteristics and packets, handle scanning, pairing, and encrypted command transmission, and keep paired vehicle data in a secure local store with a lightweight backend if needed. Approach: parallel native components with a shared core, robust BLE management, strong encryption, and a clean UX that feels instant at up to 3 m. I’ll deliver production builds (iOS TestFlight, Android Play Console), well-commented code in a single repo, and concise setup docs. I’ll also provide a proof‑of‑concept plan and timeline if you want a quick start. Technical questions How many vehicles should the app support initially and how will they be identified in the app? What BLE security mode and encryption scheme should we use for command packets? Which platforms and SDKs must be locked to specific versions (iOS/Android) during the project? Do you require a cloudless local-only model, or is a lightweight backend acceptable for key revocation logs? What’s the expected maximum number of concurrent paired vehicles per user? Are there any
$750 USD in 19 days
9.2
9.2

Hello , I’ll develop a secure cross-platform (Flutter/React Native) mobile app that enables drivers to lock/unlock vehicles via BLE within 2 seconds, protected by mandatory biometric authentication on every access. * Secure BLE-based lock/unlock with encrypted communication and fast response (<2 seconds within 3m range) * Mandatory biometric authentication (Face ID / Touch ID / Fingerprint) on every access * Seamless vehicle pairing, key management, and access revocation * Cross-platform app (single codebase) with smooth performance on iOS & Android * Background-ready system with auto-reconnect and real-time status feedback * Crash-free, optimized performance with stress-tested reliability and scalable architecture Let’s chat.. Thanks
$580 USD in 12 days
9.3
9.3

Hi, This is Elias from Miami. I checked your project description and understand you’re looking to build a mobile application that lets drivers unlock and lock their car doors directly. This is a crucial feature for enhancing vehicle access and security. I’ve worked on several similar projects focused on mobile app development and understand the key technical challenges involved. I’ll ensure the app is user-friendly, reliable, and secure while integrating the necessary backend functionalities. I’d be happy to go through the details and suggest the best technical approach. I have a few questions to get a better understanding: Q1 – What specific platforms are you targeting (iOS, Android, or both)? Q2 – Do you have existing systems that the app needs to integrate with? Q3 – What kind of user authentication are you considering for the app? Looking forward to hearing from you.
$500 USD in 5 days
8.1
8.1

SECURE, INSTANT CAR ACCESS WITH BIOMETRIC + BLE—BUILT FOR SPEED & RELIABILITY I understand the need for a fast, secure, cross-platform app that unlocks/locks vehicles via BLE with zero friction. With 12+ years in mobile + IoT/BLE systems, I’ve built apps handling secure device control and real-time communication. Approach: Framework: Flutter (single codebase, high performance) BLE Layer: Native plugins (CoreBluetooth / Android BLE) for stable scanning, pairing, and encrypted command transmission Security: Mandatory biometric auth (Face ID / Touch ID / Fingerprint) on foreground + action Secure key storage (Keychain / Keystore) Encrypted BLE packets (AES-based, aligned with your module specs) Core Flow: User opens app → biometric auth → auto-connect to paired vehicle → tap lock/unlock → encrypted BLE command → instant response (<2s) Features: Fast BLE scanning & reconnect Paired vehicle management (local secure storage) Key revocation support Minimal, clean UI for instant use Reliability: Retry + timeout handling for BLE Background/foreground lifecycle control Stress-tested for 24h stability (no crashes) Deliverables: ✔ iOS (TestFlight) + Android (Play build) ✔ Clean, documented source code ✔ Setup guide
$350 USD in 15 days
8.4
8.4

Hi there, I understand you want a cross-platform mobile app (iOS and Android) to lock/unlock your car doors from the phone, with a single shared codebase, secure biometric protection every time the app foregrounds or a command is pressed, and BLE-based communication with the vehicle module. I will build a production-ready app using a shared codebase (Flutter or React Native) to keep maintenance light, with native modules for biometric prompts on each platform and robust BLE handling for scanning, pairing, and encrypted command transmission. The app will store paired vehicles securely (local storage with encryption or a lightweight backend) and provide a simple setup flow for pairing. The acceptance criteria will be met with fast lock/unlock within 2 seconds at 3 m range and no crashes in automated tests. I will supply well-commented code in a shared repo and provide concise setup and usage docs. Here is how I’ll approach it: 1) define a clean architecture with a native biometric gate on every foreground or command press, 2) implement BLE connections using platform-optimized libraries, 3) create a secure vault for paired keys, 4) implement a lightweight backend/local storage for revocation, 5) deliver production builds with clear release notes and tests. What is your preferred cross-platform framework for a single codebase (Flutter or React Native), and do you have any constraints on using native modules for BLE and biometrics? Proposed short-term plan: PoC to show BLE lock/
$750 USD in 16 days
7.5
7.5

Hi - the real challenge here is not sending a BLE command, it is making lock, unlock, proximity, ignition, authentication, and foreground/background behavior safe every time the phone reconnects. I’d build the app around the ESP32 state machine, with CH1 pulse for doors, CH2 latch for ignition, biometric gating, secure token storage, and BLE-first control with Wi-Fi as fallback. User opens app - biometric succeeds - app connects to EV-SEC-01 - sends AUTH token - reads state - hold-to-unlock sends CH1_PULSE - ignition requires confirmation before CH2_ON. Looks correct, but fails when background BLE reconnects and stale state triggers the wrong UI. Connection loss can cause unsafe assumptions in real use, so I handle it with device-authoritative state, command blocking on AUTH_FAIL, and reconnect guards. Input - biometric + BLE/Wi-Fi state. Processing - secure command layer. Output - controlled vehicle access. The part to get right early is the BLE authentication and state sync lifecycle.
$500 USD in 7 days
7.1
7.1

Greetings, I have strong experience in backend and mobile systems using PHP and Python and I have worked with tools like Scrapy BeautifulSoup and Selenium while also building secure real time applications. I have handled BLE communication MQTT flows and device control systems with focus on stability encryption and fast response. I will develop a cross platform app with a single code base that connects to your ESP32 module using BLE and WiFi. I will implement RSSI based proximity unlock secure token authentication biometric protection and reliable command handling for CH1 and CH2 with accurate state tracking and smooth UI flow. I provide clear communication regular updates and I will ensure all testing meets your timing and stability requirements. I will also offer two weeks of post launch support. Here you can check my portfolio [https://www.freelancer.pk/u/Hammadhassan21](https://www.freelancer.pk/u/Hammadhassan21) Please start a chat so we can discuss a few questions and I am ready to start immediately. Best Regards Hammad
$500 USD in 7 days
7.2
7.2

Hi, I will deliver a cross-platform keyless entry app using Flutter — biometric authentication, BLE scanning/pairing, and encrypted lock/unlock command transmission — with TestFlight and Play Console builds plus full documentation. For BLE reliability within your 2-second target, I will implement a persistent background connection manager that maintains an active GATT link while the app is foregrounded, rather than scanning fresh each time. This eliminates the 1–3 second discovery overhead and ensures near-instant command delivery once biometric auth clears. Questions: 1) Does the keyless entry module use standard GATT services, or will I be working with a proprietary BLE profile from the sample packets you mentioned? Looking forward to your response. Best regards, Kamran
$270 USD in 10 days
7.4
7.4

Hi, We can build your secure BLE car lock/unlock app for iOS and Android using a single shared codebase. We’ve worked on several mobile apps with BLE device control and biometric authentication, so we’re familiar with low-latency, hardware-based workflows. Approach • Cross-platform app (Flutter or React Native) • BLE pairing, scanning, and encrypted commands • Native biometric auth (Face ID / Touch ID / fingerprint) required on every action • Secure storage for paired vehicles Deliverables • iOS + Android production builds • Clean, commented source code • Setup + integration guide Key requirements met ✔ Unlock/lock within ~2 seconds ✔ Biometric required every time ✔ Stable BLE performance Timeline MVP in 2–4 weeks after BLE specs review. Regards Interconnect Team
$500 USD in 7 days
6.8
6.8

Mobile App | BLE Car Lock/Unlock (iOS + Android) Hi, I understand you need a secure mobile app to lock/unlock cars via BLE with biometric-only access and fast response. I have solid experience with real-time systems, mobile apps, and hardware-level integrations (including Bluetooth + secure flows). How I’ll approach this: * Cross-platform app (Flutter or React Native for single codebase) * BLE integration: scanning, pairing, encrypted command handling * Secure local storage for keys (Keychain / Keystore) * Mandatory biometric auth (Face ID / Touch ID / Fingerprint) on every action * Optimized communication to achieve <2s response within range * Clean, minimal UI focused on speed I’ll ensure reliability, security, and smooth performance as per your requirements. Ready to start immediately. Thanks! Purnima
$750 USD in 20 days
6.8
6.8

With over [number] years of hands-on experience in full-stack web and mobile application development, I offer you a blend of versatile skills, expertise, and unwavering commitment to quality. My proficiency with the core technologies involved in your project, such as React Native, Flutter, Swift, and Kotlin, make me an ideal candidate to turn your vision into reality ensuring optimal functionality across iOS and Android platforms. Having worked extensively on both front-end and back-end development projects, I've honed my ability to create intuitive user interfaces that enhance end-user experience while adhering to the highest standards of security. I understand the gravity of protecting sensitive personal data like car access through rigorous biometric authentication protocols and can assure you a seamless integration with the existing keyless entry module. Moreover, I'm well-versed in handling BLE communication protocols necessary for your project. My prior experiences in creating IoT-based applications including integrating sensors, devices, and gateways further validates my ability to handle your automotive app development efficiently. With a mindset of continual innovation, an upper hand in managing APIs & databases, and a penchant for top-notch performance optimization; I am confident the app delivered will not only meet but exceed your expectations. Let's collaborate; let's redefine digital access to automobiles!
$300 USD in 7 days
6.9
6.9

Hey, i will build your secure cross-platform car lock/unlock mobile app with a single codebase, integrating Bluetooth Low Energy communication and biometric authentication for a fast, safe, and seamless user experience Professionally, I will use Flutter or React Native, implement secure BLE scanning and encrypted command transmission, ensure instant Face ID / Touch ID protection on every action, and build a reliable device pairing system with secure local storage while maintaining low-latency performance across iOS and Android Do you already have the BLE protocol documentation ready, or should I help structure the integration flow from scratch based on your sample packets? Portfolio: https://www.freelancer.pk/u/zainalitariq245 I’m ready to start immediately Zain Ali
$400 USD in 12 days
6.4
6.4

Hi, You need a secure mobile app that puts car access in users' hands—no physical keys required. Before we dive in: are you integrating with existing vehicle systems, or building the backend infrastructure from scratch? We've shipped iOS and Android apps handling sensitive operations. Let's talk details. Best Regards, Hasan
$250 USD in 21 days
6.7
6.7

Hi, I’d be glad to build this securely. I understand you need a cross-platform iOS/Android app that uses native biometric authentication before sending encrypted BLE lock/unlock commands to an existing vehicle keyless entry module. My experience includes Flutter/React Native mobile apps, BLE scanning/pairing, secure local storage, biometric authentication, encrypted command workflows, crash testing, and production mobile deployment. I would start with a BLE proof of concept using your characteristics and sample packets, then implement pairing, key revocation, foreground biometric checks, lock/unlock flows, stress testing, and TestFlight/Play Console builds. Best regards, Stratos
$500 USD in 7 days
6.6
6.6

Hello, I will develop your MOBILE APPLICATION for Android and IOS both platforms with Web admin panel. I am Tulsiram. I have 10 years of experience working as Native and Crossplatform mobile application developer. I am understood your requirements. I am glad if we are working together. If you interested then let's connect. I will provide you Daily updates ,source code after development completed, 1 Year maintenance Support in following Steps: I will available daily 10-12 hours in Working days for you. I will provide you regular updates according to which modules we will decided. After approval each module by you then i will provide your complete source code of your project and will shift on your Domain. Thanks
$250 USD in 35 days
6.6
6.6

Hello There!!! ★★★★ ( Secure BLE-based keyless car access with fast reliable unlock system ) ★★★★ I understand you need a cross-platform mobile app for keyless car entry using BLE, with strong biometric security and smooth lock/unlock within seconds. The app must integrate with your ESP32 module, handle proximity logic, and ensure stable performance without cloud dependency. ⚜ BLE scanning, pairing & encrypted communication ⚜ Biometric auth (FaceID/TouchID/Fingerprint) ⚜ RSSI-based proximity auto unlock/lock ⚜ Wi-Fi fallback via MQTT integration ⚜ Clean dashboard with real-time vehicle state ⚜ Secure token storage (Keychain/Keystore) ⚜ Play Store & TestFlight deployment I have experince in Flutter & native apps with BLE integrations and IoT systems, including ESP32-based controls. I’ll follow your state-machine logic, optimize background scanning, and ensure low-latency response. Code will be clean, tested and well documented. Would love to discuss your hardware + timeline and start quickly. Warm Regards, Farhin B.
$256 USD in 10 days
6.6
6.6

Hello, I hope you are doing well. I understand that you are looking to build a KEYLESS CAR ENTRY MOBILE APPLICATION, and I would be happy to help. I have extensive experience in designing and developing applications and have successfully delivered many projects. What I offer: -Development using the latest technologies -Daily project updates and clear communication -On-time delivery within the agreed timeline -Complete source code provided after project completion -One year of support for the developed work -10+ years of experience in web and app development -Fully responsive, fast-loading, and SEO-friendly design -A powerful super admin panel to manage the entire system Please feel free to initiate a chat so we can discuss your requirements in detail. Thank you and regards, Dheeraj K.
$250 USD in 7 days
7.0
7.0

With more than 14 years as a Principal Architect specializing in mobile app development, I have successfully launched over 50 apps globally, employing modern frameworks like Flutter and React Native. My vast experience also includes backend development, which will be crucial for integrating with your vehicle's keyless entry module and ensuring secure command transmission. Operating atop to ensure the reliability of your car keys, I am adept at building robust & clean apps engineered for both iOS and Android platforms, created for one code-base for maintenance simplicity. In addition, my skills extend to incorporating the latest advancements such as biometric authentication, aligning with your objective of a seamless user experience through the Keyless Car Entry Mobile App. Additionally, I've worked on BLE projects before that have honed my skills in transmitting secure packets between devices, which will be pivotal when handling the lock/unlock process. Adding to my strengths is my nuanced understanding of automotive app development— a subject already familiar to me. I can deliver exactly what you seek while considering car safety and user convenience equally important in this particular realm of technology. Working together would not just bring about successful project completion but also open doors for future collaborations enhancing the efficiency and overall usability of the already smart system.
$1,500 USD in 7 days
6.1
6.1

Hello, I’ve gone through your project details on the Keyless Car Entry Mobile App, and this is something I can definitely help you with. I have 10+ years of experience in mobile app development, specializing in both iOS and Android platforms using Flutter. My focus is on implementing secure and scalable architecture, which is crucial for your requirement of biometric authentication. Given your need for smooth BLE integration and real-time performance, I will ensure the app communicates efficiently with the vehicle's existing keyless entry module, providing a user-friendly experience. I’ll also provide well-documented code and setup instructions to assist with future maintenance. Here is my portfolio: https://www.freelancer.in/u/ixorawebmob I’m really eager to ensure we approach this project correctly. Could you clarify: 1. Do you have any design preferences or specific UI/UX guidelines? Let’s discuss over chat! Regards, Arpit Jaiswal
$250 USD in 21 days
7.5
7.5

Hi there, We’ve developed multiple mobile apps that connect with hardware over BLE, including a car key app that lets users unlock their vehicles using their phones. We understand the importance of security and have implemented biometric authentication in our previous apps, ensuring a seamless user experience. For your project, we can use a hybrid framework like Flutter or React Native to create a single codebase for both iOS and Android, while also delivering fully native apps. This approach allows us to optimize performance and leverage platform-specific features when needed. We also have extensive experience with backend technologies like Node.js and PHP, and we’ve built secure, scalable solutions that comply with GDPR and CCPA regulations. Let’s schedule a 10-minute introductory call to discuss your project in more detail and see if I’m the right fit for your needs. I’m eager to learn more about your exciting project. Best, Adil
$512.17 USD in 7 days
5.9
5.9

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