Flutter Sports Social App | MUST PASS Offline GPS Background Tracking Demo Test

@webbookstudio

Hi there, We understand you're looking to develop a sports and chatting app that connects users with workout partners, starting with an MVP build that includes core features like SMS login, location-based services, real-time IM, and sports activity tracking. Our team at Webbook Studio has experience with mobile app development, including Flutter for both iOS and Android, and expertise in Android background location policies. 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 willing to build the offline demo as the first step, which will include continuous GPS location collection and real-time route drawing on a map, and provide source code, build instructions, and a demo video. Can you please confirm if there are any specific design requirements or brand guidelines we should follow for the demo and the subsequent MVP development? Feel free to message us to discuss the details! — Webbook Studio

@Hammadhassan21

Hi I can develop a reliable cross-platform Flutter application with a strong backend foundation, ensuring stable background location tracking (5-second intervals) and seamless integration of real-time features like IM and location-based matching. I will first deliver the required offline Android demo that meets your testing conditions across Huawei, Xiaomi, OPPO, and Vivo devices. I will implement: • Offline Android demo with continuous GPS tracking + real-time route drawing • Stable background tracking (lock screen, battery saver, Doze mode compliant) • Flutter-based cross-platform app (iOS + Android) • PHP backend with complete API architecture and database design • NetEase Yunxin SDK integration for real-time messaging • LBS “Nearby Users” system with map integration (AMap for China) • User profiles and sports activity tracking system I have experience building Flutter apps with advanced background services, location tracking, and real-time communication, including handling OEM-specific Android restrictions for stable long-running tasks. I’ve worked on apps requiring precise GPS tracking, background execution, and third-party SDK integrations, ensuring reliability across different Android environments. Here You Can Check My Professional Portfolio: https://www.freelancer.com/u/Hammadhassan21 Let's connect with me chat to discuss more about your project. Best Regards Hammad.

@shrec

Hello, I have strong experience with Flutter, background GPS tracking, real-time map rendering, and handling Huawei/Xiaomi/OPPO/Vivo battery restrictions for stable long-running tracking apps. I can build the required offline Android demo first with: * Continuous 5s GPS tracking * Real-time route drawing on AMap * Stable background/lock-screen operation * Source code + demo video I also have experience with PHP backend architecture and IM SDK integrations. I accept your escrow/payment terms and can start immediately. Demo delivery within 1 business day. Best regards

@zainalitariq245

Hey, I will build your sports and real-time connection app MVP with a strong focus on reliable LBS tracking, user matching, real-time chat integration via NetEase Yunxin SDK, and a scalable PHP backend architecture designed for stable performance and future expansion. I will develop the full system with proper database design, API structure, and cross-platform Flutter implementation, ensuring smooth location tracking, secure authentication, and optimized background performance aligned with Android vendor restrictions for Huawei, Xiaomi, and other Chinese devices. Before full MVP, can I confirm whether your priority is maximum background GPS stability or full chat + social features in Phase 1? Please Check my Profile: https://www.freelancer.com/u/zainalitariq245 Best Regards: Zain Ali

@mahig47

Hello! As per your project post, you’re looking to build a Flutter-based sports social networking MVP focused on nearby user discovery, real-time chat, and sports activity tracking, with a critical emphasis on highly reliable background GPS tracking performance under strict real-device conditions (especially Huawei and Xiaomi). My focus will be on delivering: a Flutter cross-platform MVP app with SMS authentication, nearby users feature using LBS + AMap support for China region, real-time messaging integration via NetEase Yunxin SDK, user profiles and social interaction layer, sports activity tracking module, PHP backend architecture setup with clean API design and database schema, and a scalable system structure ready for Phase 2 expansion. I specialize in Flutter + native Android/iOS hybrid systems, real-time location tracking applications, and large-scale chat/social platforms with focus on background service stability, SDK integrations, and high-performance mobile architectures. My recommendation would be Flutter for shared UI plus native Android service layer for GPS tracking enforcement. Let’s connect to discuss whether Phase 2 will include features like route-based sports analytics, AI workout matching, live activity feeds, or gamification so the backend and tracking architecture can be designed to support long-term scalability from day one. Best regards, Nikita Gupta.

@codefusion53

Hi, Your MVP has a very clear technical risk, and I agree the offline Android background location demo is the right first step before discussing the full build. Stable GPS tracking on Huawei, Xiaomi, OPPO, Vivo, lock screen, Doze mode, and battery saver needs real device testing, not assumptions. I can build the offline Flutter or native Android demo with continuous GPS collection, route drawing on AMap, 5 second tracking interval, background execution, lock screen support, build instructions, source code, and a short proof video. After the demo passes, I can support the full MVP with Flutter for iOS and Android, PHP backend architecture, API design, database schema, SMS login, nearby users, profiles, sports tracking, and NetEase Yunxin SDK integration. I have experience with mobile location tracking, background services, map integration, real time chat SDKs, backend APIs, and production mobile deployment. I am also comfortable working with escrow based milestones and acceptance testing. Best, Justin

@Rajoriadares

Hello Client, Greeting of the day!!!! I read your job description. I have STRONGEST 10 years experience in Mobile development and have been DEVELOPED 150+ Apps, three dating app, Two Customer and service provider app based on GPS location and notification functionality and based on different domain like sports, Health, GYM, personal business and social etc I have testing team for testing apps. I think I am strongest person for doing this job and provide the quality product with testing. I am always available for your support. Thanks

@TechizeBuilder

Hi, I came across your project "Sports and Chatting App Development" and I'm confident I can help you with it. About Me: I'm a full stack developer and agency owner with over 8+ years of experience in PHP, Mobile App Development, Flutter, Android, iOS Development. , and I understand exactly what’s needed to deliver high-quality results on time. Why Choose Me? - ✅ Expertise in required Technologies and 1 year post deployment free support - ✅ On-time delivery and excellent communication - ✅ 100% satisfaction guarantee Let’s discuss your project in more detail. I’m available to start immediately and would love to hear more about your goals. Looking forward to working with you! Best regards, Deepak

@FizzaNadeemK

Hi, I will build your offline Android GPS tracking demo with stable background location updates and route rendering optimized for Huawei, Xiaomi, and other restricted Android environments. I’ve reviewed your requirement for 5-second interval tracking, lock-screen persistence, and vendor-specific background restrictions and have 7+ years experience in Flutter and native Android location systems with heavy background service optimization. I will implement a standalone demo app with continuous GPS collection, real-time polyline route drawing, and tested background execution under Doze mode and battery saver conditions, delivered with full source code and build instructions. Can you confirm if the demo should use Flutter or native Kotlin for the initial proof-of-concept? Best Regards, Fizza Nadeem K

@MIndlabsAi6

Hi 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'm passionate about taking on your Sports and Chatting App Development project. I understand the project's requirements for building a sports and chatting app with core features such as SMS login, nearby user location services, real-time messaging, user profiles, and sports activity tracking. I would approach the project by leveraging my expertise in cross-platform development with Flutter and integrating third-party IM SDKs like NetEase Yunxin to deliver a robust solution. Let's discuss further details in chat. Cheers, Vishal Maharaj

@devbaloni1983

Hello, I am an expert with 15+ years of experience in the technical world, delivering simple to complex websites, e-commerce platforms, membership systems, and custom portals. I always provide clear communication, continued support after delivery, and 100% client satisfaction. I specialize in PHP development, building secure, scalable, and high-performing web applications with custom scripts, API integration, and database management (MySQL, MariaDB, etc.). From dynamic websites to enterprise-level solutions, I focus on delivering clean code and business-driven results.

@techsty2014

Hi there, We will build your offline GPS tracking demo on Flutter, then deliver the full sports social MVP: SMS login, LBS nearby users, NetEase Yunxin IM, profiles, and activity tracking. For the background GPS demo, we will use a foreground service with a wake lock, combined with vendor-specific battery whitelist prompts for Huawei, Xiaomi, OPPO, and Vivo. This approach bypasses Doze mode reliably at 5-second intervals. We have tested this pattern on EMUI and MIUI, where standard location services get killed within minutes without these steps. We confirm we will build the offline demo as the first step, with source code, build instructions, and a locked-screen video on real devices. A couple of quick things to confirm: 1) Which AMap SDK version are you using, and do you have the API keys ready? Looking forward to your response. Best regards, Faizan

@chiragpipal

⚠️ If you're not happy, you don’t pay. ⚠️ Hi there, thank you for sharing the detailed project overview. I've reviewed your requirements carefully. I can build your sports and chatting app with a focus on connecting users with workout partners using Flutter for both iOS and Android, ensuring the app is fast, scalable, and user-friendly. I will deliver: • SMS login • Nearby Users functionality • Real-time IM with NetEase Yunxin SDK • User profiles • Sports activity tracking You will also receive a comprehensive guide for using the app effectively. I am confident I can execute your vision professionally and efficiently. Looking forward to discussing timeline and next steps. Best regards, Chirag.

@UzeeTech

As an experienced Full-Stack Developer, with a primary focus on Mobile App Development and deep proficiency in Android and Flutter, I am well-equipped to handle the unique challenges your sports and chatting app presents. I have spent 7+ years honing my skills in building production-grade web applications and mobile apps for various platforms, including iOS and Android. Besides cross-platform development with Flutter, I also have extensive experience publishing apps to major Chinese Android app stores like Tencent App, Huawei, Xiaomi, etc., ensuring stable long-term operations. What sets me apart is my adaptive nature to learn and employ APIs from third-party IM SDKs like NetEase Yunxin—vital for your project's successful execution. My adept knowledge of Android background location policies aligns beautifully with your project's need for continuous GPS location collection, particularly on vendors like Huawei, OPPO, VIVO, Xiaomi, etc. Moreover, I understand the significance of an efficient backend architecture which is why my expertise extends to languages like PHP for complete backend architecture setup, API design & database schema. Alongside this,I assure you that my familiarity with AMap for route rendering will prove beneficial for the "Chinese user" demographic of your app users.

@HamparProd

Hi, This project is a strong fit because the first priority is not UI, but proving stable offline background GPS tracking under real Android device restrictions before moving into the full sports social app. I can build the offline Android demo first with continuous GPS collection, route drawing on map, foreground service handling, battery optimization guidance, local storage, and test-ready build instructions for Huawei, Xiaomi, OPPO, and Vivo devices. For the full MVP, I would use Flutter for the mobile app, PHP for the backend, AMap for China route rendering, SMS login, nearby users, profiles, activity tracking, and NetEase Yunxin SDK integration for real-time IM. The key technical part is designing the tracking layer carefully so location updates remain stable in background, lock screen, and battery saver conditions while keeping the later MVP architecture clean and scalable. I am comfortable with the escrow-based demo-first process and can provide source code, build instructions, and a short proof video for the offline tracking demo before moving into Phase 1.

@abela399

Hi, I’ve worked on Flutter apps with continuous background GPS tracking before, including handling aggressive Android battery restrictions on Xiaomi and Huawei devices where most tracking implementations fail after a few minutes. Are you open to using a small native Android service layer for the tracking engine if it improves stability on Chinese OEM devices? The hardest part here is keeping location updates alive consistently under lock screen, Doze mode, and vendor battery optimization, so I’d focus the demo around a reliable foreground service architecture first before touching the social features. I’m also comfortable with NetEase Yunxin integration, PHP backend setup, realtime location flows, and nearby-user systems for the MVP phase. And yes, I’m willing to build the offline demo first with source code, build steps, and real-device test video as requested. Kind regards, Abel.

@marcosfermin

Howdy! Thanks for sharing this project — I read the post and the scope is clear to me. I am a hands-on engineer who has shipped similar work end to end, with a focus on stability, clean structure, and clear communication. I can start quickly, share progress as we go, and confirm the small details (stack, timelines, must-have features) before writing any code so we agree on the path forward. If you can share a bit more about the current setup or the most important outcome, I can map a concrete first step and a realistic delivery window. Thank you, Marcos.