Flutter GPS Tracking Demo | $50 deducted from Phase 1 budget, stable GPS on Chinese OPPO under background/lock screen/power save (no kill), 2-day full Flutter source code, proven AMap & NetEase/Tencent IM SDK experience

@graphicaa

Hello, could you please share whether the detailed SDK list in the attached file is mandatory for Phase 1, or only for future development? We will complete: Build the required offline Flutter demo using AMap with stable background GPS tracking, adaptive 5s/15s intervals, real-time route drawing, and detailed tracking logs. Optimize background location for Huawei, Xiaomi, OPPO, Vivo, and Honor devices, including lock screen and battery-saving scenarios. Deliver complete source code, build documentation, and demonstration videos on real devices. After demo approval, develop the Phase 1 sports and chat app with PHP backend, NetEase Yunxin IM integration, Nearby Users, activity tracking, and App Store deployment support. Please connect with me in chat, we discuss more and finalise the action plan, optimum time & cost estimate. Thank you, Gopal I will share demo links of similar past work we’ve done in a private chat.

@webbookstudio

Hi there, We understand you need a Flutter sports app with stable GPS background tracking, especially on Chinese devices like OPPO, under various modes such as lock screen and full power saving. Our team at Webbook Studio has experience with Flutter and GPS tracking, having developed apps like a music voting mobile app using React Native and Node.js. We're confident in our ability to deliver a demo that meets your requirements, including continuous GPS location collection and real-time route drawing on a map using AMap, within the specified tracking intervals and conditions. We'll provide a complete demo app with source code, build instructions, and a video demo. Can you please confirm if there are any specific additional features or integrations you'd like to see in the demo beyond the specified requirements? Feel free to message us to discuss the details! — Webbook Studio

@onkarkulkarni8

Hi, I can help with your "Flutter Sports App GPS Background Tracking Demo | $50 Fee Deducted From Phase 1 Budget, Must Maintain Stable GPS Tracking On Chinese OPPO Devices Under Background, Lock Screen & Full Power Saving Mode (No Process Kill), 2-Day Delivery With Complete Flutte" project. I build clean, maintainable PHP backends — core PHP and Laravel/Symfony, MySQL schema design, and well-structured REST APIs. For work involving php, mobile app development, android, mobile app testing, ios development, backend development, flutter, I pay close attention to validation, security, and readable code, delivering in small, testable milestones. I provide clean commits and clear documentation. Could we discuss the specifics before I firm up the timeline? ⭐ 5.0/5 from a recent client: "They delivered the project well ahead of the committed delivery date. It was an experienced team, and I would be happy to hire them again." Final timeline and cost will be confirmed in chat after a complete understanding and documentation of the project expectations in detail.

@XanvraTECH

Hello, I am very interested in your project involving building a sports and chatting app with GPS background tracking functionality. I understand the requirement for developing a stable GPS tracking system on Chinese OPPO devices under various modes. With expertise in Flutter, iOS Development, Android, and Backend Development, I am confident in delivering the required features. I plan to implement continuous GPS location collection and real-time route drawing on a map to meet the specified criteria. My experience in mobile app development and knowledge of background location policies make me a suitable candidate for this project. - MY WORK STATS: ✨ https://www.freelancer.com/u/XanvraTECH I look forward to discussing this project further and demonstrating my capabilities in meeting your requirements. Best regards, Warda Haider

@umairdev101

I will deliver the Flutter Sports App GPS Background Tracking Demo within 48 hours. I specialize in deep Android background execution and have successfully bypassed aggressive battery management on OPPO and Xiaomi devices using foreground services combined with wake locks and custom battery optimization whitelisting instructions. I will implement a persistent notification service that ensures the location stream remains active even under full power saving mode and lock screen states. My experience includes building sports tracking apps where millisecond accuracy is vital for workout partner proximity. I will provide the complete Flutter source code and a tested APK for your verification on Chinese ROMs. This demo will serve as the foundation for the Phase 1 development.

@CodeAnchors

Greetings, I have a clear understanding of your Flutter Sports App project, focusing on connecting users with workout partners. My approach includes structured requirement confirmation, controlled planning, clean implementation, testing & validation checkpoints, and milestone-based transparency for reliable execution and long-term results. With expertise in PHP, Mobile App Development, Android, Backend Development, Flutter, and iOS Development, I am well-equipped to deliver the desired outcomes. You can view my portfolio here: ⭐⭐ https://www.freelancer.com/u/CodeAnchors ⭐⭐ Could you please clarify your top priority or business goal for this project? I invite you to open a chat to finalize the scope smoothly. Looking forward to the opportunity to collaborate. Best regards, Muhammad Anas Khan

@FizzaNadeemK

Hi I can help build your sports and social app with a strong focus on reliable background GPS tracking and smooth user experience. I understand the importance of the first offline Android demo, and I’m ready to build the AMap-based tracking proof of concept with background location, route drawing, and stability testing. My experience includes Flutter development, mobile location services, real-time features, API integration, and handling device-specific Android restrictions. For Phase 1, I can support SMS login, nearby users, real-time chat integration, profiles, activity tracking, and complete backend setup with PHP. I’m comfortable following your acceptance process and providing source code, documentation, and demo verification materials. I’d be happy to discuss the demo requirements and start with the first milestone. Best Regards, Fizza Nadeem K

@NEHABHAT92

With over nine years of experience in web and mobile development, I possess the skills and knowledge crucial for your project. I'm well-versed in Android, iOS, Flutter, and PHP which you've specified you need for this project. I have previously worked on developing apps with similar demands to those imposed by the Chinese Android market ~ Huawei, OPPO, VIVO, Xiaomi, etc. My portfolio includes apps that have been successfully published in the Apple App Store and major Chinese stores like Tencent App making them go through long-term operation smoothly. Furthermore, my team and I are extremely familiar with background location policies that are important for attaining an uninterrupted continuous background tracking on Chinese OPPO devices as required by your app. We recognize the need to work across all widely-used Chinese Android devices (Huawei, Xiaomi, OPPO, Vivo) while using AMap for route rendering. For robust performance and excellent user experience, we will integrate the NetEase Yunxin SDK with your full backend architecture setup and database schema setup. Most importantly, to ensure our mutual compatibility before discussing budget or timeline , I'm absolutely willing to build proof-of-concept demo first as per your statements which is a great initiated step. Being versed in mapping software i.e Amap for route rendering in China will prove very useful too. You can rely on us for

@SkillCrafts

I understand the critical requirement for stable background GPS tracking on Chinese OPPO devices, even under strict power-saving and lock-screen conditions, mirroring the challenge of maintaining real-time data streams for your sports app. My experience developing robust location services for demanding mobile environments, particularly with devices known for aggressive process management, has equipped me to tackle this precisely. My approach will leverage the `geolocator` package for core location services, combined with `background_fetch` and `workmanager` for persistent background execution. I will implement a custom foreground service with persistent notifications to prevent OS termination on OPPO devices and employ strategies like adaptive tracking intervals and precise location acquisition only when necessary to balance accuracy and battery. Rigorous testing on various OPPO models with different power-saving profiles will be paramount, ensuring reliability across all specified conditions. Could you confirm if the specific OPPO models you've encountered issues with are running ColorOS 11 or later, as this impacts background process handling? Additionally, is there a preferred accuracy level (e.g., 10m, 50m) for the background tracking data? I'm available to discuss this further and demonstrate a similar proof-of-concept.

@MusouDigital

Hi there, we have recently completed a similar project and would love to share some references. Your Flutter GPS Tracking Demo sounds right up our alley, and we would love to exceed your expectations. With over 9 years of experience, we specialize in seamless Flutter development, particularly focusing on background location tracking. We will ensure the demo maintains stable GPS functionality across various devices, meeting your outlined criteria. Here’s how we would approach the project: - Develop a 100% offline Android demo app with continuous GPS tracking. - Implement real-time route drawing using AMap. - Conduct thorough testing on major Chinese devices to validate performance under various conditions. While we might be new to Freelancer, I truly appreciate you taking your time to review our proposal, and I would love to discuss this project more. Kind regards, Trichelle

@nowars

Hello, I have experience building Flutter mobile apps with background GPS tracking, native Android location services, and performance optimization for challenging device environments. I can first deliver the offline AMap GPS demo with route tracking, adaptive intervals, logs, and background stability testing. I understand Chinese OEM restrictions (OPPO/Xiaomi/Huawei) and can provide clean source code, documentation, and demo proof. I’m ready to start immediately.

@mengw3

Hi. Background location on Chinese Android is exactly my specialty, and I agree to the offline demo first, that's the right way to prove it. On OPPO, Huawei, Xiaomi and Vivo the OS kills background apps hard, so continuous 5-second tracking under lock screen and battery saver comes down to a foreground service with an ongoing notification, a partial wake lock, and getting the app onto each OEM's autostart and battery-optimization whitelist, plus requesting background-location permission correctly per Android version. For the demo: a fully offline Android app, no server, collecting GPS every 5 seconds and drawing the route live on the map, running stable for 30-plus minutes through lock screen, background and battery-saver on those OEMs. I hand over the full Flutter source, build instructions, and a screen-recorded video showing the locked-screen tracking holding on an OPPO or Xiaomi device. For the formal app I've integrated AMap and NetEase/Tencent IM SDKs before, so the map and chat pieces are known ground, not a first attempt. On my experience with Chinese-device background location and relevant work, I'll share the demo repo and tracking videos with you directly so you can run the stability test yourself before we talk budget and timeline for the full build. I can deliver the demo inside the two-day window.

@PrateekP3003

Hello! As per your project post, you are looking for an experienced Flutter developer to first deliver an offline Android proof of concept that demonstrates stable background GPS tracking using AMap on major Chinese Android devices, and then continue with the full development of a sports and social networking application featuring location-based matching, real-time messaging, and activity tracking. My focus will be on building a robust technical foundation that satisfies your strict acceptance criteria while ensuring the architecture is scalable for future phases. My focus will be on developing the offline Android demo with continuous background location tracking, adaptive tracking intervals, real-time route rendering using AMap, detailed tracking logs, and compatibility with vendor-specific Android power management on Huawei, Xiaomi, OPPO, Vivo, and Honor devices. I specialize in Flutter, Dart, Android, iOS, PHP, REST APIs, MySQL, GPS and location-based services, real-time messaging, Firebase, WebSockets, mobile performance optimization, and scalable cross-platform application development. My focus is on delivering reliable, maintainable, and high-performance mobile applications that perform consistently across a wide range of devices while following clean architecture and best development practices. Best regards, Prateek

@Aaleen110

I understand you need a Flutter demo app that demonstrates stable GPS tracking on Chinese OPPO devices, even in background, lock screen, and full power saving modes without process killing. I've successfully developed a similar background location service for a fitness tracking app, maintaining consistent data capture across various Android devices with aggressive battery optimization. The demo will be a single-screen Flutter application built with `geolocator` and `background_locator` packages. It will display current latitude and longitude, and a "Start Tracking" button. Upon activation, it will continuously log GPS coordinates to a local SQLite database, with visual feedback on the screen indicating active tracking. The core challenge of background persistence on OPPO devices will be addressed through specific platform channel implementations for Android, ensuring compliance with their power management policies. What is the minimum acceptable location update frequency for this demo? Ready to start as soon as you confirm scope.

@Kashifscode

Hello! I understand this project requires a Flutter sports/social app with the most critical challenge being reliable background GPS tracking on Chinese Android devices before moving into full development. I have experience building Flutter mobile applications with location services, background execution, map integrations, real-time communication, and third-party SDK integrations. I would approach the demo by implementing AMap integration, optimized background location services with moving/stationary detection logic, battery-aware tracking, detailed tracking logs, and testing across Huawei, Xiaomi, OPPO, and Vivo devices before proceeding to Phase 1 development with Yunxin IM, PHP backend APIs, user systems, LBS discovery, and sports tracking features.

@Anika1802

I have strong experience in Flutter application development, GPS-based tracking systems, real-time location features, and mobile app integrations. I can help you build your sports and chatting platform with a focus on performance, stability, and smooth user experience. I understand the importance of the first offline GPS demo requirement. I can develop the Android demo with continuous background location tracking, AMap integration, route drawing, moving/stationary detection logic, and stable performance under lock screen and battery-saving modes. For the complete application, I can handle: • Flutter-based Android & iOS app development • SMS authentication and user profiles • Nearby users using LBS technology • Real-time chat integration with NetEase Yunxin SDK • Sports activity tracking and route history • PHP backend API development with database architecture • Secure and scalable app structure I will provide clean source code, proper documentation, build files, and regular updates throughout the development process. My focus is on delivering a stable application that performs reliably across different Android devices including Huawei, Xiaomi, OPPO, and Vivo. I am ready to start with the offline GPS demo as the first step and can proceed with the next phase after successful testing. Looking forward to discussing your requirements and starting the development.