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I’m building a mobile application that lets people broadcast text-only messages to everyone inside a geographic zone they draw on the map. The moment a user enters, exits, or simply stands within that zone, the message should arrive instantly; anyone outside the boundary stays silent. Zones are created on-the-fly by the user—think free-form circles, polygons, or any latitude/longitude shape they need—so the system has to watch position changes continuously without draining the battery. The app must run natively on both iOS and Android and feel identical on each platform. I’m comfortable if you work in React Native, Flutter, or separate native stacks, as long as the final builds pass App Store and Google Play review. Behind the scenes a lightweight backend should store active zones, push new messages through APNs/FCM in under two seconds, and expire or archive old broadcasts automatically. Deliverables • Universal iOS + Android app with map interface for drawing, editing, and deleting custom zones • Realtime text message delivery engine (WebSockets or pub/sub) integrated with push notifications • Scalable backend/API with basic admin dashboard to view zones and traffic • Source code, build instructions, and a short test plan covering edge-cases like overlapping zones and rapid movement Acceptance criteria 1. A device inside a zone receives the text within 2 s, verified over 4G and Wi-Fi. 2. Moving outside the boundary suppresses further pushes until re-entry. 3. Battery usage for continuous location tracking stays under 5 % per hour in a field test. 4. App passes TestFlight/Internal Testing with no blocking crashes. If you’ve worked with Google Maps SDK, MapKit, Firebase Cloud Messaging, or similar tooling, this should feel familiar. Let’s create a smooth, real-time, location-aware messaging experience.
Project ID: 40357986
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Hiring me, Abdul, would be an excellent choice for your Geofenced Real-Time Messaging App project. My expertise lies in creating Flutter apps that are reliable, highly-functional, and offer a great user experience - traits your project requires. I'm familiar with the tools you've listed including Google Maps SDK, MapKit, and Firebase Cloud Messaging and have successfully built real-time applications in the past. My work history is filled with building different types of apps such as e-commerce stores, booking systems and even live tracking applications; all of which encompass elements necessary for your undertaking. Furthermore, I value not just the functionality but also the scalability and maintainability of an application which can be seen in my past projects where I've included things like concisely created backend integration to ensure smooth running without future hurdles. In addition to my technical skills, I'm highly committed to timely delivery and effective communication. As a freelancer who's experienced with business dashboards and admin panels, I'll make certain to equip your final deliverable with an intuitive admin dashboard that'd allow you to visualize zones and essential analytics. Lastly, taking into consideration your need for battery optimization while ensuring real-time location tracking for extended periods; I assure you my proficiency would cater to this need effectively.
$750 CAD in 7 days
4.0
4.0
318 freelancers are bidding on average $1,188 CAD for this job

Greetings from Logictrix! My name is Jas, and I am looking forward to discuss about your app in details over the Chat or Call. We have enough app developers available in team so I can assure you to deliver this project at a fairly low cost with great quality and with a commitment for long term support. *** We have now earned 'Expertise' level in AI, ChatGpt and a couple of other AI platforms for App development and other Chatbot work! *** We have developed around 400+ Android and iOS apps using Native and Flutter SDK in the past 15 years, Many apps are Live in Google play and App store. We will share our detailed portfolio over the Chat once we connect. Looking forward to your reply... Thanks and Regards Jas
$800 CAD in 10 days
9.7
9.7

Hello! We carefully reviewed the description of your project and can confirm that we fully understand your requirements. We are very interested in building your real-time, geo-based messaging application and confident in delivering a fast, scalable, and battery-efficient solution. With over 25 years of experience, our team has strong expertise in mobile app development (React Native/Flutter), geolocation systems, and real-time architectures. We have experience working with Google Maps SDK, MapKit, WebSockets, Firebase Cloud Messaging (FCM), and APNs for low-latency communication. Approach: We will implement dynamic geo-fencing with support for custom shapes (circles/polygons), optimized background location tracking, and a real-time messaging engine using WebSockets/pub-sub with push notification fallback. The backend will handle zone logic, message delivery, and automatic expiration with high performance. We will ensure sub-2s message delivery, efficient battery usage, and seamless behavior across iOS and Android, along with a simple admin dashboard and full documentation. We are ready to start immediately and can deliver a robust, production-ready system aligned with your acceptance criteria. Please review our profile here: https://www.freelancer.com/u/Microlent We would be happy to discuss your project in more detail via Freelancer chat or call. Best regards, Jasmin
$1,125 CAD in 7 days
9.4
9.4

✔️✔️✔️✔️✔️ Real-Time Geo-Zone Messaging App (iOS & Android) ✔️✔️✔️✔️✔️ Hello, I checked your requirement and understand you want to build a real-time, location-aware messaging app where users can draw custom geographic zones and instantly broadcast messages to users within those boundaries. User Roles & Features: Admin: • Monitor zones and message traffic • Manage/expire broadcasts • View analytics and system activity User (Sender/Creator): • Draw custom zones (circle, polygon, free-form) • Create and broadcast text messages • Edit/delete zones • Manage active broadcasts User (Receiver): • Receive messages when داخل zone • Stop receiving when خارج zone • Real-time updates based on movement System Features: • Cross-platform app (Flutter/React Native) • Google Maps SDK / MapKit integration • Real-time geofencing engine (low battery optimized) • WebSocket/pub-sub messaging system • Push notifications via Firebase (FCM) + APNs Let’s chat… Thanks
$980 CAD in 18 days
9.3
9.3

Hi, This is Elias from Miami. I checked your project description and understand you want a cross-platform mobile app that lets users draw custom geo-zones on a map and instantly broadcast text-only messages to people who enter, exit, or remain inside those boundaries. The key challenge is combining accurate geofencing, fast push delivery, and continuous location tracking without creating battery drain or store-review issues. I’ve worked on mobile apps with maps, realtime messaging, push notifications, and backend APIs, so I understand the technical tradeoffs around geofencing reliability and performance. I would approach this by building the app around a shared mobile codebase, a location-aware backend for zone/event processing, and a push pipeline optimized for fast delivery, while testing edge cases like overlapping zones, rapid movement, and background tracking early. I have a few questions to get a better understanding: Q1 – Should messages be triggered only by user movement events (enter/exit/dwell), or can a user inside the zone also receive newly created broadcasts instantly without moving? Q2 – Do you want free-form polygons in the MVP, or should we start with circles/polygons only and expand shape options later? Q3 – For the admin dashboard, do you just need traffic/zone visibility, or also moderation controls for broadcasts and users? Looking forward to hearing from you.
$1,125 CAD in 7 days
8.1
8.1

Hello, I have carefully reviewed your requirement for a geofenced real-time messaging app and understand the need for **accurate location tracking, instant message delivery, and efficient battery usage**. With 10+ years of experience in mobile and backend development, I can build a scalable solution using **React Native (for cross-platform), Firebase (FCM), and Node.js backend with WebSockets/pub-sub architecture** for real-time communication. **Approach:** • Map integration (Google Maps SDK / MapKit) with custom zone drawing (circle/polygon) • Real-time location tracking with optimized battery usage • Backend for zone management, message routing, and expiry logic • Push notifications via FCM/APNs (<2 sec delivery) • Admin dashboard for monitoring zones and activity The system will handle **entry/exit detection, overlapping zones, and rapid movement scenarios** with reliable performance. WE WILL FOLLOW AGILE METHODOLOGY WITH CLEAR MILESTONES. I WILL PROVIDE 2 YEAR FREE ONGOING SUPPORT AND COMPLETE SOURCE CODE, AND ASSIST FROM DEVELOPMENT TO APP STORE DEPLOYMENT. I am ready to start and deliver a stable, real-time solution. I eagerly await your positive response. Thanks
$750 CAD in 7 days
8.3
8.3

Hi. Using Flutter, I can build your app for Android and iOS. As you know, Flutter is the best cross platform for Android and iOS I am very familiar with Flutter and Social App. I have mobile and backend skills with 8+ years. I wish to work for you. Thanks for attention.
$750 CAD in 8 days
7.8
7.8

Hi, I can build a real-time, location-aware mobile app that delivers instant text broadcasts within custom-drawn geographic zones, optimized for performance and low battery usage. I recommend using React Native for a consistent iOS/Android experience, with Google Maps SDK / MapKit for zone drawing and geofencing, and a Node.js + WebSocket (or Firebase Pub/Sub) backend for sub-2s message delivery. For your core requirements: • Custom Zones – Draw/edit polygons, circles, and free-form areas with efficient geospatial indexing (PostGIS) • Realtime Messaging – WebSockets + FCM/APNs push fallback to ensure <2s delivery • Location Tracking – Smart geofencing + adaptive polling to keep battery usage under 5%/hr • Entry/Exit Detection – Instant triggers when users cross boundaries • Backend सिस्टम – Scalable API with auto-expiry, message lifecycle, and admin dashboard I have experience building real-time apps with maps, push notifications, and scalable backend systems, ensuring both accuracy and performance. We can communicate more on this matter. Kindly accept the offer so we can discuss further. Thank you Jennifer
$1,125 CAD in 7 days
7.9
7.9

I understand you need a geofenced real-time messaging app for iOS and Android, allowing users to broadcast messages within custom drawn zones. The app must deliver messages instantly, manage battery usage efficiently, and pass App Store and Google Play review. I have extensive experience in mobile app development and have worked with Google Maps SDK and Firebase Cloud Messaging. I am confident in creating a seamless location-aware messaging experience. Let's discuss the project scope further to ensure alignment. Please review my profile for my 15 years of experience. Let's start the job and show my commitment.
$840 CAD in 14 days
7.0
7.0

Hello there, I will deliver the geofenced messaging app — cross-platform map interface with zone drawing, real-time text broadcast engine, and a lightweight admin dashboard — targeting sub-2s delivery on both iOS and Android. For battery efficiency, I will use the OS-level geofence APIs (CLMonitor on iOS, GeofencingClient on Android) to offload boundary detection to the hardware coprocessor instead of polling GPS continuously. This keeps location tracking well under your 5% per hour target while still triggering instant WebSocket events on zone entry and exit. Questions: 1) Do you have a preference between Flutter and React Native, or should I recommend based on the geofencing requirements? 2) What is the expected concurrent zone count — dozens or potentially thousands — so I size the pub/sub layer accordingly? Looking forward to discussing further. Best regards, Kamran
$1,096 CAD in 13 days
7.4
7.4

Hi there, For a "broadcast-on-entry" platform, I propose a React Native stack utilizing Headless JS and native modules to maintain background persistence without draining the battery. I have deep experience with the Google Maps SDK and Firebase Cloud Messaging, ensuring your messages land in under 2 seconds across 4G and Wi-Fi. What I bring to the build: • Efficient Geolocation: Implementing a tiered tracking system that scales power consumption based on proximity to active broadcast zones. • Scalable Backend: A lightweight Go or Node.js API using Redis for sub-millisecond lookups of active geographic shapes. • Store Success: Full management of the deployment process, from TestFlight stability to final Google Play compliance. I’ve built similar real-time tracking engines and can provide a detailed test plan for rapid movement edge cases. Ready to turn your map into a broadcast hub?
$850 CAD in 7 days
6.9
6.9

Hi, A geo-fenced broadcast messaging app where users draw custom zones and anyone inside receives messages instantly — under 2 seconds, battery under 5% per hour. Technically precise build and we have the experience to hit every acceptance criteria. What we deliver: - Flutter app for iOS and Android — identical experience, App Store and Google Play ready - Map interface for drawing, editing, and deleting custom zones via Google Maps SDK - Continuous location tracking optimized for battery efficiency under 5% per hour - Real-time delivery via WebSockets with APNs/FCM push notifications under 2 seconds - Entry/exit detection suppressing pushes correctly on zone departure and resuming on re-entry - Scalable backend with automatic zone expiry and archival - Admin dashboard for monitoring zones and traffic - Source code, build instructions, and edge-case test plan Delivering sub-2s delivery, sub-5% battery, and crash-free store approval starts at $10,500 CAD — below that the real-time engine gets compromised. Quick call to walk through your zone logic? Everything stays private. Are you available this week? Anthony Muñoz
$10,000 CAD in 30 days
6.9
6.9

Hi Dear, We can build this using Flutter or React Native for a consistent iOS and Android experience, combined with a backend powered by Node.js or Firebase. The system will include real-time messaging via WebSockets or pub/sub, geofencing logic optimised for battery efficiency, and integration with APNs and FCM for reliable push delivery under 2 seconds. We will also develop an admin dashboard to monitor zones, traffic, and system performance, along with full documentation and test coverage for edge cases like overlapping zones and rapid movement. Before proceeding, I have a few questions: ================================== Do you prefer Firebase-based architecture or a custom backend (Node.js + WebSockets + database)? Should messages be anonymous or tied to user profiles/authentication? What is the expected scale (approx. concurrent users and zones)? Do you need moderation controls (approve/reject broadcasts, reporting, abuse prevention)? Best Regards, Srashtasoft Team
$1,125 CAD in 7 days
7.0
7.0

Hello, I understand you want a mobile app for instantly sending text messages to people inside a user-drawn geographic zone. Users can create flexible shapes like circles or polygons, and messages arrive immediately when people enter or stand in those zones while staying silent outside. The app needs to look and work the same on iOS and Android, and continuous location tracking should not drain battery. I will build the app using React Native or Flutter, whichever suits best, with a backend to store zones, push messages fast, and clean up old messages automatically. I’ll also make an admin dashboard and test all edge cases like overlapping zones and fast movement. To do this, I’ll integrate map tools (Google Maps SDK/MapKit) for zone drawing and Firebase Cloud Messaging for near-instant pushes. I’ll ensure messages deliver under 2 seconds, keep background location tracking efficient, and that your app passes all store reviews smoothly. What is the maximum number of active zones users might create simultaneously, and do you expect many overlapping zones in one area? Do you have any preference between React Native, Flutter, or native technologies for development? What backend infrastructure or cloud services are you currently using or prefer for this project? Would you like support for multiple languages or accessibility features in the app? How do you want the message expiration to work—should expired messages disappear from users’ devices automatically? Thanks,
$1,500 CAD in 14 days
6.6
6.6

Hi, This is a powerful concept we have experience building real-time, location-based mobile apps and can deliver a smooth, scalable solution across both iOS and Android. Our approach: Build a cross-platform app (Flutter or React Native) with a seamless map interface for drawing and managing custom zones (circles/polygons) Implement real-time messaging using WebSockets/pub-sub with instant push delivery (under 2s via FCM/APNs) Optimize location tracking for low battery usage with smart background updates and geofencing logic Develop a scalable backend + admin dashboard to manage zones, messages, and activity Deliverables: Fully functional iOS & Android apps Real-time messaging engine + push notifications Backend/API + admin panel Source code, build instructions, and test plan Timeline: 3–5 weeks (depending on final scope and testing) We’ve worked with similar technologies and can ensure performance, reliability, and app store compliance. Happy to discuss architecture and next steps. Best regards, INTERCONNECT Team
$1,125 CAD in 7 days
6.7
6.7

Hi, your idea of location-based zone-triggered messaging is clear and technically interesting. The main challenge is balancing real time delivery with efficient background tracking, and I’ve worked on similar apps using Google Maps SDK, MapKit, and Firebase Cloud Messaging where timing and accuracy were critical. Achieving sub-2 second delivery with dynamic, user-defined zones is absolutely feasible with the right setup. To build this, I’d use Flutter or React Native for cross-platform support, with a backend based on Firebase or laravel using a pub and sub model. Instead of relying only on OS geofencing limits, I’d implement a hybrid approach with background location updates and server-side zone checks, optimized for performance and battery usage. Push notifications via FCM/APNs would ensure fast and reliable delivery. I’ve handled real-time tracking, polygon geofencing, and push optimization before, so edge cases like rapid movement, overlapping zones, and re-entry control will be covered. I’ll also include a simple admin dashboard, proper documentation, and testing to ensure smooth deployment. One thing I’d like to clarify is whether you expect high user density in zones, and if message persistence is required during connectivity loss. This will help refine the backend design. I can deliver this with clean, maintainable code and a realistic timeline. Let’s connect to discuss your vision in more detail. Thanks.
$900 CAD in 7 days
6.4
6.4

Hello, I will develop your GEOFENCED REAL TIME TEXT MESSAGING 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
$750 CAD in 35 days
6.6
6.6

Hello, I will build your cross-platform geofencing application using Flutter and Riverpod, ensuring a unified codebase that achieves 60fps map performance on both iOS and Android. To meet your strict 2-second delivery and 5% battery targets, I’ll implement background geolocation with motion-recognition logic (distinguishing between stationary and transit states) to minimize GPS polling. The backend will utilize Node.js with Redis Geospatial indexes for O(logn) polygon lookups, ensuring instant matching as coordinates stream via WebSockets. I’ll integrate FCM and APNs for low-latency delivery and use PostgreSQL with PostGIS to handle complex free-form shapes. Deliverables include: Native Map UI: Intuitive polygon/circle drawing tools. Real-time Engine: Sub-2s push notification pipeline. Admin Dashboard: Live traffic and zone monitoring. Test Suite: Validating signal handovers and overlapping boundary logic. Let’s deploy a high-performance, battery-optimized location experience.
$1,200 CAD in 20 days
6.4
6.4

Hello, I hope you are doing well. I understand that you are looking to build a Geofenced Real-Time Messaging App and I would be happy to help. I have extensive experience in designing and developing Application 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.
$750 CAD in 12 days
7.0
7.0

Hi I will be able to help you in your messaging app. I have done lots of work on firebase, socket , Twilio and agora. Please message me so that we will have detail technical discussion. I have 9+ years of combined experience in Mobile Application development, Website development, Desktop application development, 3rd party Artificial Intelligence api, AR/ VR, Chatbot, Blockchain- Cryptocurrency, CRM & ERP, Game Development and any other Software development. I am having expertise in Native on Android Java, kotlin and IOS Swift, and For Hybrid Cross platform on Flutter Dart & React- Native, and for web and backend on react js and node js, Python Django. Please consider me and initiate a chat for further detailed discussion. Regards, Anju
$1,000 CAD in 25 days
6.6
6.6

Hello, As a team at the forefront of web and mobile app development, we have extensive proficiency in Android and iOS native stacks, as well as React Native and Flutter. This empowers us to strongly commit that your mobile application project aiming for seamless geofenced real-time messaging will be delivered before exceeding your expectations. Our specialized skills in working with Google Maps SDK, MapKit, Firebase Cloud Messaging, and similar tooling align greatly with the requirements you've outlined. This familiarity ensures that we are well-equipped to handle all aspects of this project with ease, from creating the map interface for drawing the custom zones to integrating the real-time text message delivery engine with push notifications. Moreover, we understand the need for a scalable backend solution for storing active zones, pushing new messages through APNs/FCM promptly, and efficiently managing zone expirations. This has been consistently reflected in our previous projects through which we created reliable and high-performance APIs. In addition, our advanced test planning techniques ensure excellent performance even during challenging events like overlapping zones and rapid movements. Let’s collaborate to build a secure, efficient, and serendipitous messaging experience! Thanks!
$850 CAD in 8 days
6.3
6.3

brampton, Canada
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