Flutter Sports Social App|Paid Refundable GPS Background Tracking Demo Required (Chinese Domestic Huawei/Xiaomi/Oppo/Vivo device you must own, 1-day delivery, $50 fully refund milestone, fee deducted from Phase1 budget on pass. Do not bid if disagree!)

@infowider11

⭐️⭐️⭐️ Flutter Sports & Social App with GPS Tracking, Chat & LBS Matching ⭐️⭐️⭐️ Hello, I checked the JD and you need a Flutter-based sports and social networking app with a proof-of-concept offline GPS tracking demo followed by a scalable cross-platform application featuring real-time location, messaging, workout partner matching, and a PHP backend. Key Features: * Offline Android GPS tracking demo * Continuous background location tracking * Real-time route drawing with AMap * Adaptive tracking intervals * Background, lock-screen & battery saver support * Location logs & accuracy tracking * Flutter cross-platform development * SMS authentication * Nearby users (LBS) * User profiles * Sports activity tracking * NetEase Yunxin IM integration * Real-time one-to-one & group chat * PHP backend development * REST API development * Database architecture * Secure authentication * Push notifications * Cross-platform synchronization * Admin dashboard Let’s chat… Thanks

@webbookstudio

Hi there, We understand you're looking to develop a sports and chatting app that connects users with workout partners, and you require a proof-of-concept demo that showcases continuous GPS location collection and real-time route drawing on a map for Android devices, specifically Huawei, Xiaomi, OPPO, and Vivo. Our team at Webbook Studio has experience with Flutter and cross-platform development, including background location tracking on Android and iOS devices. We've worked on similar projects, such as a music voting mobile app using React Native and a furniture store mobile shopping app using Flutter. We're confident in our ability to deliver a stable and functional demo within the required 1-day timeline. Can you please confirm if there are any specific requirements for the demo app's user interface, or if we should focus solely on the functionality of the GPS tracking and route drawing? Feel free to message us to discuss the details! — Webbook Studio

@n2rtechnologies

SKIP.

@vbcool7

As someone with over 7 years of experience in Mobile and Web development, I'm confident in my ability to not only meet but exceed the requirements for your project. My extensive background in native and cross-platform frameworks, including Flutter, means I have the knowledge required to build your sports and chatting app. I've successfully deployed apps on Apple App Store as well as major Chinese Android app stores like Huawei and Xiaomi, which makes me unparalleled at integrating third-party SDKs including NetEase Yunxin, one of the required components of your project. Having worked extensively with location services, I fully understand the intricacies of implementing stable GPS tracking that works flawlessly on different Android models. I have hands-on experience working with Huawei, OPPO, VIVO and Xiaomi devices; which enables me to surmount challenges particular to vendor-specific background location restrictions. Moreover, my proficiency in using AMap for route rendering qualifies me to cater for users in China. I'd be glad if you took some time out to review past projects that I've completed successfully. A look at my portfolio will give you a detailed view of the range and calibre of work that I'm capable of accomplishing. With all these credentials, let's move forward with building a groundbreaking sports and chatting app together!

@asifalimzd

Hi there, I have experience developing Flutter applications with reliable background GPS tracking, real-time location services, map integration, and scalable backend systems. I can build a stable offline Android demo using AMap, implement continuous background tracking with intelligent moving/stationary intervals, detailed logging, and ensure compatibility with major Chinese Android devices before proceeding to the full sports and chat platform with PHP backend and NetEase Yunxin integration. I also confirm that I am willing to build the required offline demo as the first step. Do you already have real Huawei, Xiaomi, OPPO, and Vivo devices available for acceptance testing, or would you like me to test on my own compatible devices as well? Kindly send me a message to discuss more. Thanks.

@ZohaibRoy

⭐⭐⭐⭐⭐ Build a Sports and Chatting App to Connect Workout Partners ❇️ Hi My Friend, I hope you're doing well. I've reviewed your project requirements and see you're looking for an expert to create a sports and chatting app. Look no further; Zohaib is here to help you! My team has completed 50+ similar projects in app development. I will create a 100% offline Android demo app that meets your specifications, focusing on GPS tracking and real-time route drawing. Once the demo passes, I can also provide UI/UX design at an additional fee. ➡️ Why Me? I can easily do your project as I have 5 years of experience in app development, specializing in Flutter, GPS tracking, and real-time communication. My expertise includes Android background policies, SDK integrations, and app publishing. I have a strong grip on other relevant technologies, ensuring a smooth development process. ➡️ Let's have a quick chat to discuss your project in detail. I can also show you samples of my previous work. Looking forward to our conversation! ➡️ Skills & Experience: ✅ Flutter Development ✅ Android App Development ✅ iOS App Development ✅ GPS Tracking ✅ Real-time Communication ✅ UI/UX Design ✅ API Integration ✅ Database Management ✅ Background Services ✅ App Publishing ✅ AMap Integration ✅ NetEase Yunxin SDK Waiting for your response! Best Regards, Zohaib

@Hammadhassan21

Greetings, You need a cross-platform sports and social application with highly reliable background GPS tracking, real-time location features, IM integration, and a scalable backend, beginning with an offline Android proof-of-concept that meets your strict acceptance criteria. I will build this with: Flutter-based Android/iOS application, offline AMap GPS tracking with stable background location services, PHP backend with REST APIs and NetEase Yunxin SDK integration, real-time chat, nearby users, activity tracking, and a scalable architecture for future Phase 2 features. Using Flutter, native Android services for vendor-specific background location optimization (Huawei, Xiaomi, OPPO, Vivo, Honor), AMap SDK, PHP/Laravel, MySQL, NetEase Yunxin SDK, and Firebase/APNs for notifications, this will be a high-performance application designed for stable long-term operation across Chinese Android devices while maintaining a shared codebase for Android and iOS. I have experience building location-based mobile applications, real-time messaging integrations, and Flutter applications with background services. I also confirm that I am willing to build the required offline Android demo as the first step according to your acceptance criteria. Let’s discuss. Best regards, Hammad

@redstone2409

The bid amount and delivery time above are rough placeholders - we'll sharpen them once the demo passes and we work out the full scope of the formal app. We've dealt with background location on Chinese Android hardware before, and we know this is the hard part of the whole project. Huawei, Xiaomi, OPPO and Vivo all run custom OS layers that are extremely aggressive about killing background processes, and your 5-second interval requirement under lock screen and battery saver is exactly where most implementations fall apart. Your demo requirement makes sense - it's a real filter, and we're fine with it. Here's how we'd tackle the demo: - Background service: Android native foreground service running below the Flutter layer, not just a background_location plugin. This keeps the process alive under Doze, battery saver and lock screen on all four OEMs without relying on each manufacturer's whitelist. - Adaptive interval logic: speed threshold at 0.5 m/s to switch between 5s (moving) and 15s (stationary) intervals, applied in both foreground and background. The on-screen log shows state, interval, timestamp and GPS accuracy in real time so everything is visible during your test. - AMap integration: AMap Android SDK to draw the route live as points come in, fully offline with no server calls. - Device testing and video: we test on real Huawei and Xiaomi hardware and record a screen capture showing 30+ minutes of stable tracking under lock screen and battery saver conditions, with the log visible throughout. After the demo passes and we get the UI/UX designs, we'd build the formal app in Flutter with a PHP or Node.js backend handling the social and matching features, real-time chat and activity feeds. After a short scope chat we'll put together a proper proposal PDF covering milestones, timeline and firm pricing for Phase 1 and beyond. Want to jump on a quick call this week to walk through the demo spec before we kick it off? Best, Redstone Catalyst

@TalhaAhmed02

Hi, The success of your demo won't depend on GPS accuracy alone. The real challenge is surviving aggressive background process management on Huawei, Xiaomi, OPPO, and Vivo while still respecting Android's foreground service policies. Build the demo around a resilient background location architecture instead of device-specific workarounds. Add detailed tracking logs so every interval, state change, and accuracy issue is easy to verify during testing. Keep the codebase ready to evolve into the full Flutter app without rewriting the tracking module later. Phase 1 – Deliver the offline AMap tracking prototype with clean, documented source code. Phase 2 – Extend the same foundation into the complete Flutter app with backend, IM integration, and location services. Phase 3 – Optimize stability, battery usage, and store readiness across Android and iOS. One important question: what acceptance method will you use to verify the required 5-second and 15-second tracking intervals on different Chinese Android brands?

@DeveloperStation

Hi there, I’ve developed multiple apps with real-time GPS tracking, including a fitness app that tracks users’ outdoor activities and shares data with friends. We used Google Maps and OpenStreetMap for route rendering, and I’m well-versed in optimizing background location tracking to ensure minimal battery consumption. For your project, I can deliver a fully functional offline demo app that meets all your requirements within 24 hours. I’ll also provide a short video demonstrating the app’s performance in different scenarios, such as background mode and battery-saving mode. Let’s schedule a 10-minute introductory call to discuss your project in more detail and see if I’m the right fit. Feel free to message me anytime—I usually respond within 10 minutes. I’m eager to learn more about your exciting project. Best regards, Adil

@godesignpk

Hello, We went through your project description and it seems like our team is a great fit for this job. We are an expert team which have many years of experience on PHP, Mobile App Development, Android, Mobile App Testing, iOS Development, Backend Development, Flutter Lets connect in chat so that We discuss further. Regards

@XanvraTECH

Hello, I am interested in your project for building a sports and chatting app with a focus on connecting users with workout partners. I understand the requirement for a verifiable proof-of-concept before discussing budget or timeline, involving building an offline Android demo app with continuous GPS location collection and real-time route drawing. With expertise in Flutter, iOS Development, Mobile App Development, PHP, Android, and Backend Development, I am well-equipped to handle the project requirements. My experience with background location on Chinese Android/iOS devices and integrating third-party IM SDKs aligns with your needs. - MY WORK STATS: ✨ https://www.freelancer.com/u/XanvraTECH I am willing to build the offline demo as the first step and look forward to discussing further details. Best regards, Warda Haider

@devsrank

Hello, We would like to grab this opportunity and will work till you get 100% satisfied with our work. We are an expert team which have many years of experience on PHP, Mobile App Development, Android, Mobile App Testing, iOS Development, Backend Development, Flutter Please come over chat and discuss your requirement in a detailed way. Regards

@codefusion53

Hi I confirm I can build the offline Flutter Android demo first, 100 percent offline with no server or APIs, using AMap for map display and real time route or trail drawing. I have hands-on experience with Android background location on Chinese devices, including Xiaomi MIUI, Huawei EMUI, OPPO ColorOS, Vivo Funtouch and power management restrictions, and I will implement the demo using a native foreground service based approach plus vendor friendly settings and robust permission handling to keep 5 second moving interval and 15 second stationary interval working under lock screen, background running, and battery saver modes. The demo will include an on screen log with state moving or stationary, interval, timestamp, and accuracy, and build instructions plus a short video showing continuous tracking for at least 30 minutes on real devices. After demo acceptance, I will proceed to Phase 1 in Flutter and align the backend architecture in PHP with your API design, database schema, and full integration of NetEase Yunxin into your user system. I am also willing to do the extra UI UX scope for an additional fee if you award UI/UX after the demo. Best, Justin

@samarhabib

Greetings, I have experience building Flutter applications with real-time GPS tracking, maps, and scalable backend integrations, and I'm confident in delivering a stable solution for your sports and social platform. I’m happy to start with the offline AMap background-tracking demo, provide the source code and documentation, and proceed to Phase 1 once it passes your acceptance tests. Why work with me? ★ Proven track record: 75 successful projects with 5-star reviews ★ Responsive, deadline-focused, and committed to results ★ 3 months of free post-launch support Let’s schedule a quick chat to discuss your preferred tech stack, timelines, and launch goals. I’m confident I can bring your vision to life. Best regards, Samar H.

@CodeAnchors

Greetings, I understand the importance of developing a sports and chatting app that connects users with workout partners seamlessly. Before delving into budget and timeline discussions, I am fully prepared to demonstrate my expertise in Flutter, Android development, and background location tracking on Chinese devices through a verifiable proof-of-concept. My portfolio includes successful projects that showcase my proficiency in PHP backend development, Flutter, and iOS development. My approach involves structured requirement confirmation, controlled planning, clean implementation, and rigorous testing to ensure the app meets your expectations. I am committed to delivering reliable execution and long-term results for your project. Could you please clarify your top priority or primary business goal for this app? Let's discuss further in an open chat to finalize the scope smoothly. Best regards, Muhammad Anas Khan

@FizzaNadeemK

A 1-day “stable background GPS tracking across Huawei/Xiaomi/OPPO/Vivo, lock screen, battery saver, 5-second interval logging” is not a small demo requirement—it’s essentially a production-grade location service test under the strictest Android OEM restrictions. The hard truth is that Android background location is no longer just code. It’s a permission + foreground service + OEM battery policy battle. On Huawei and Xiaomi especially, aggressive power management will kill location updates unless the service is correctly structured, whitelisted behavior is accounted for, and the device-specific constraints are handled explicitly. A proper AMap-based tracking demo can absolutely be built, with state-based interval switching (moving vs stationary) and clear logging, but reliability across all listed Chinese devices cannot be guaranteed in a 24-hour “universal stability test” without device-specific tuning and real hardware validation cycles. What can be realistically done in a first offline demo is a clean Flutter or native Android foreground location service using AMap SDK, with speed-based state detection, persistent notification service, and structured logs showing movement, timestamps, and accuracy, running continuously under standard background conditions. Best regards, Fizza Nadeem K

@MIndlabsAi6

Hey there, I'm Vishal Maharaj, a seasoned developer with 25 years of experience in PHP, iOS Development, Flutter, Android, Backend Development, and Mobile App Testing, based in Perth, Australia. I understand the project requirements for the Flutter Sports Social App, specifically the need for an offline Android demo app showcasing continuous GPS location collection and real-time route drawing on Chinese Android devices like Huawei and Xiaomi. I would approach this project by meticulously developing the demo app to meet the specified criteria and seamlessly transition into the formal app development phase, ensuring all features are implemented flawlessly. Let's discuss further details and get started on this exciting project. Cheers, Vishal Maharaj

@PINESCRIPTERR

Hi, I can help build the Flutter sports/social app and start with the required offline Android GPS tracking demo before Phase 1. For the demo, I would implement continuous background GPS collection with AMap, route drawing on the map, movement/stationary detection, 5s moving interval, 15s stationary interval, visible logs for state, timestamp, interval and accuracy, plus lock-screen/background testing support. I understand the key challenge is stability on Huawei, Xiaomi, OPPO, Vivo and other Chinese Android devices, especially battery optimization and background restrictions. For Phase 1, I can build the Flutter app with SMS login, nearby users, sports activity tracking, user profiles, NetEase Yunxin IM integration, JPush notifications, permissions handling, analytics events, and PHP backend APIs with database schema and SDK integration. I’m comfortable working from your SDK list, including AMap, NetEase Yunxin, Aliyun SMS, JPush, permission handling, Hive/SharedPreferences, form validation, and analytics. I confirm I’m willing to build the offline demo as the first step under your required review process. Question 1: Will you provide the Huawei/Xiaomi/OPPO/Vivo devices for final acceptance testing, or should I arrange testing access? Question 2: For Phase 1 backend, do you already have a PHP framework preference, such as Laravel or ThinkPHP? Regards, Houssame