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I’m developing a single application that needs to feel native in a desktop browser while also working as an installable app on both iOS and Android. The core product focuses on three pillars: secure authentication, solid data synchronization that stays consistent across devices and sessions, and reliable push notifications that can be fine-tuned from the backend. I’ve already created the desktop version using AI, but I want an expert to refine the project so it’s clean, runs flawlessly, and is ready to deploy. The role covers the full stack required to achieve this—from choosing the right cross-platform framework (React Native, Flutter, Ionic, or another justified option) to setting up streamlined deployment pipelines for the App Store, Google Play, and a responsive web version. RESTful or GraphQL APIs, real-time databases, and cloud messaging services will be part of the stack, so experience with these is essential. I need a detailed project proposal outlining your recommended tech approach and why it suits this use case, milestones for implementing authentication, data sync, and push notifications, timeline estimates, testing and release processes, and any assumptions or dependencies I should address. Please include examples of previous cross-platform launches these three features in production, as I’ll review proposals and arrange a quick call to clarify scope before awarding the project.
Project ID: 40469638
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269 freelancers are bidding on average $539 USD for this job

Hi there, Jas this side from Logictrix and I am ready to work on your app with my team and with a promise for long term support in fairly low cost. Please just give me your few minutes for the chat so that we can discuss all the important points about project as well as we can clarify any queries from both side to go ahead further for final agreement. We will use AI tools to developed your app very quickly and so in cheapest cost as we are expert in AI development and we used many AI platforms like openAI, Freepik, Antigravity, Cursor etc for App development and other AI 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
$500 USD in 7 days
9.6
9.6

Hi, I understand you already have a desktop version and now need an expert to clean it up, choose the best cross-platform path, and make it ready for web, iOS, and Android release. My approach would be to first review the current code and product flow, then suggest the right stack based on your app logic, auth needs, sync behavior, and notification rules. For this kind of project, I would likely consider Flutter or React Native with a clean API layer, secure auth, real-time sync through a managed backend, and cloud push messaging controlled from the backend. I will also plan App Store, Google Play, and responsive web release steps, with testing for login, offline/online sync, session handling, notification delivery, and device-level edge cases. I can prepare clear milestones for authentication, data sync, push notifications, QA, and final deployment, plus note any risks or dependencies before build work starts. Can you share the current desktop app repo or tech stack so I can check whether it is better to refine it, wrap it, or rebuild the mobile version properly? Do you already have a backend/API in place, or should I plan and build the REST/GraphQL API and database sync layer too? Which login methods are required, email/password only or also Google, Apple, social login, and 2FA? What type of push notifications do you need from the backend, simple broadcasts, user-based alerts, scheduled notifications, or topic/segment based controls? Best regards,
$750 USD in 13 days
9.1
9.1

Hello, I have 10+ years of experience in full-stack and cross-platform app development, including production-ready iOS, Android, and web applications with secure authentication, real-time synchronization, and push notification systems. Based on your requirements, I would recommend Flutter or React Native with a scalable backend using Firebase/Supabase or Node.js APIs depending on your long-term architecture goals. I can refine your existing AI-generated desktop application, optimize the codebase, and deliver a clean, production-ready system with seamless authentication, reliable cross-device sync, backend-controlled push notifications, and responsive web support. The project will include deployment pipelines for App Store, Google Play, and web hosting, along with testing, performance optimization, security hardening, and scalable architecture for future growth. I also have experience with REST/GraphQL APIs, cloud messaging, CI/CD workflows, and real-time databases in production environments. We will work with Agile methodology and provide regular updates throughout development. I will also provide 2 years of free ongoing support along with complete source code ownership after delivery. I eagerly await your positive response. Thanks CHRISTINA
$270 USD in 15 days
8.4
8.4

Hello, Greetings Hope you are doing well. I am a Mobile Application developer with over 5 years of experience. I am confident in my ability and skills to develop high-quality Mobile apps and would like to work on your mobile app project. I will complete the work as per your requirements. I want to discuss more this project to prepare the final concept. So let’s discuss this in detail over chat then will make plans to start work on it. Waiting for your earliest reply. Thanks. Shubham
$250 USD in 14 days
8.0
8.0

Hi, I've read your requirements carefully. You need a cross-platform app (desktop browser + iOS + Android) with three core pillars: secure auth, data sync, and push notifications — plus refinement of your existing AI-generated desktop codebase. My recommended stack: Flutter (Web + iOS + Android from a single codebase) + Node.js/Express backend + Firebase (Realtime DB for sync + FCM for push notifications) + JWT-based secure auth. Why Flutter for this: - Single codebase runs on web (desktop browser), iOS, and Android natively - Excellent performance, closest to native feel - Firebase integration is seamless for real-time sync and push notifications My approach: 1. Audit & clean up your existing AI-generated code 2. Implement secure authentication (JWT + OAuth/Google) 3. Set up real-time data sync across devices/sessions 4. Configure reliable push notifications (Firebase Cloud Messaging) with backend controls 5. Deploy to App Store, Google Play, and responsive web I'll provide: detailed milestones, timeline estimates, testing plan, and release process documentation. Happy to share examples of cross-platform apps I've launched with these features. Ready for a quick call to clarify scope before we start. Regards, Harsh Thoriya
$500 USD in 7 days
8.3
8.3

Hi — Elias here from Miami. The real challenge here is not just wrapping the desktop app into mobile, but making auth, sync, notifications, and deployment behave consistently across web, iOS, and Android. These projects usually fail when the framework choice is made before clarifying offline behavior, push rules, and shared data flow. I’d first review the existing AI-built desktop version, then recommend the best path. If the current app is React-based, I’d likely lean toward React Native/Expo with a shared API layer, but Flutter or Ionic could make sense depending on how much code can realistically be reused. I’ve worked on cross-platform apps involving secure auth, API-backed data sync, real-time updates, push notifications, and production release workflows for web and mobile. A few questions to better understand the scope: Q1 – What stack is the current desktop/browser version built with? Q2 – Does data sync need offline support, or only real-time consistency while online? Q3 – Do you already have backend APIs/cloud services in place, or should that be part of the build? Happy to review the current setup and suggest a practical milestone plan. Looking forward to hearing from you.
$500 USD in 7 days
8.1
8.1

Hi there, I have spent the decade building scalable web and mobile platforms working across multiple tech which you can verify from my profile. As you already have created the desktop version using AI, I want to know the current frontend/backend stack, how much cleanup is required in the existing architecture, and whether the synchronization logic and authentication flow are already partially implemented or still need to be structured from scratch. For this build, I feel real-time synchronization consistency, session management, and notification reliability will be the most crucial areas because applications like this often face issues with stale data states, delayed sync, device session conflicts, and inconsistent push delivery across platforms. Therefore, I would suggest Flutter with Firebase/Auth0 and a Node.js backend architecture because it will allow a single scalable codebase for iOS, Android, and responsive web while handling authentication, real-time sync, cloud messaging, and deployment pipelines more efficiently with lower long-term maintenance overhead. I would request to connect on a quick call and share access to the current build so I can review the architecture properly and suggest the most stable implementation roadmap, timeline, and deployment strategy. Thanks, Rahul A.
$370 USD in 7 days
7.8
7.8

I can help with this, I will deliver a polished PWA-capable app — secure authentication, real-time data sync, and backend-controlled push notifications — deployed to the App Store, Google Play, and web. I will also prepare the tech proposal document with milestones, timeline, and release plan. Since you already have a desktop version built with AI, I will audit that codebase first and wrap it in a Flutter shell with platform-specific adjustments rather than rebuilding from zero. This preserves your existing logic while giving you native-feel navigation, biometric auth, and FCM push — all from one codebase with minimal divergence. Questions: 1) What stack did the AI-generated desktop version use — React, Vue, or something else? 2) Do you have Apple Developer and Google Play accounts set up already? Ready to start whenever you are. Kamran
$287 USD in 10 days
7.5
7.5

As the CEO and lead developer at Carol Data Technology, a global IT service provider, I pride myself on delivering exceptional cross-platform solutions to my clients. With over 10 years of experience, my team and I are confident in our abilities to enhance your already impressive project further. My expertise in JavaScript, specifically React Native and Flutter, make me particularly suited for the job of refining your application to ensure a seamless user experience across desktop and mobile platforms. My comprehensive understanding of RESTful and GraphQL APIs, real-time databases, and cloud messaging services make me adept at resolving any potential hitches before they even come up. With the assurance of streamlined deployment pipelines for App Store, Google Play, and a responsive web version as well as his high-quality service, you can rest assured that your app will be ready to hit the market flawlessly. You’ll have consistent updates throughout the process with regular progress reports as I reassure you more hands will be diligently working on your project.
$500 USD in 7 days
7.0
7.0

| Mobile Application | Flutter | React | iOS | Android | Web Application EXPERT Hi, Thanks for sharing this opportunity! I have read your project requirements. Over the past 10+ years, I've built a strong foundation in full-stack development, specializing in mobile app development using iOS, Android, React Native, and Flutter. My proficiency in these languages would allow me to do so with great efficiency. Due to NDAs, links aren’t public—but once you open the chat, I’ll share live demos and walkthroughs. Why you should move forward with me : More than a decade experience in mobile and web app development. Full-time availability as well as daily updates and open to long-term engagements NOTE: Please pan the budget for now, we will discuss over chat. Thanks & Regards, Srishti
$500 USD in 7 days
6.9
6.9

Hi there, I’ve reviewed your Flutter app requirements and would love to help. With 5+ years of experience in cross-platform development, I specialise in clean UI, smooth performance, and robust API integration. I’ll begin with clear planning, share regular progress updates, and ensure the app is fully tested before launch. Let’s connect to discuss your vision — I’m ready to get started! Best, Bhargav Flutter Developer | Android & iOS Expert
$500 USD in 7 days
7.0
7.0

Hi Dear, I can refine your existing AI-built desktop application into a production-ready cross-platform ecosystem with secure authentication, real-time sync, and reliable push notifications across web, iOS, and Android. Your project aligns well with my expertise in cross-platform app architecture and scalable backend systems. Based on your requirements, I’d recommend Flutter or React Native with Firebase/Supabase for real-time synchronisation, secure authentication, and cloud messaging, ensuring a smooth native-like experience on all platforms. What I can deliver: ✔ Refined and optimised existing codebase ✔ Secure auth flow with session management ✔ Reliable cross-device data synchronization ✔ Backend-controlled push notification system ✔ Responsive web + iOS + Android deployment ✔ CI/CD pipelines for App Store & Google Play releases ✔ Clean, documented, version-controlled architecture I’ve worked on cross-platform applications involving real-time databases, cloud messaging, scalable APIs, and production deployments across mobile and web. I’d be happy to discuss your current setup and provide a detailed technical roadmap on a quick call. Looking forward to connecting.
$700 USD in 10 days
7.1
7.1

Hello, I am available to refine and develop the platform for Web, iOS, and Android with a strong focus on secure authentication, real-time data synchronization, and reliable push notification architecture. Main Flow: User Login → Secure Authentication → Real-Time Data Sync Across Devices → Backend-Controlled Push Notifications → Seamless Experience on Web & Mobile. I can also help with deployment pipelines, App Store/Google Play releases, testing workflows, and production hardening to ensure a stable launch-ready platform. Looking forward to discussing the architecture and sharing similar cross-platform app work with you. Best regards, Shailesh P.
$280 USD in 18 days
7.4
7.4

⭐⭐⭐⭐⭐ Project Proposal for Cross-Platform App Tech Approach: Recommend React Native with Expo for unified codebase supporting iOS, Android, and responsive web (PWA installable). Firebase for auth (secure JWT/OAuth), Firestore for real-time data sync, and Firebase Cloud Messaging for backend-tuned push notifications. Integrates well with existing desktop AI build via React Native Web. Why Suitable: Enables native performance, seamless cross-device consistency, fast deployment, and handles all three pillars efficiently without separate codebases. Milestones: Week 1-2: Refine auth + integrate with backend APIs. Week 3-4: Implement data sync across sessions/devices. Week 5-6: Setup configurable push notifications + testing. Week 7: Deployment pipelines (App Store, Play Store, web) + optimization. Timeline: 7-8 weeks total. Includes QA, bug fixes, and launch support. Testing/Release: Unit/integration tests, device emulation, beta via TestFlight/Play Console, then production rollout. Assumptions: Access to existing codebase, API specs, and client credentials provided upfront. CnELIndia Support Steps: 1) Initial scope call for clarifications. 2) Dedicated full-stack team assignment. 3) Weekly progress demos. 4) Post-launch maintenance for 30 days. Prior launches: Similar React Native apps with auth/sync/notifications for 2 fintech clients in production (100k+ users). (748 characters)
$500 USD in 7 days
7.1
7.1

Hello, With 4 years of experience in React Native, Mobile App Development, REST API, and RESTful API, I am well-equipped to tackle your cross-platform app project. I understand the requirements outlined in your project description and am confident in providing a professional solution tailored to your needs. I have expertise in Mobile App Development, Android, PhoneGap, AngularJS, RESTful API, React Native, Flutter, App Store Optimization, GraphQL, and REST API skills. I have carefully reviewed the project details and believe I can deliver this project with perfection. Let's connect in chat to discuss further and explore how we can collaborate effectively. Looking forward to the opportunity to work on this exciting project together. Best regards, Taimoor from Pixels Soft
$500 USD in 7 days
6.4
6.4

Hi, I've built cross-platform apps that work great on both desktop browsers and mobile — that's exactly what you're describing. Your project needs to feel native on each platform, which means smart code sharing without cutting corners on UX. I have delivered 1500+ web and mobile projects over 14+ years — happy to share relevant examples. Let's chat about your tech stack and timeline. Send over more details when you're ready. Thanks, Hasan
$250 USD in 21 days
6.7
6.7

Hi I will be able to help you. 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 and php CodeIgniter mvc and Laravel. Please consider me and initiate a chat for further detailed discussion. Regards, Anju
$400 USD in 7 days
6.6
6.6

Hi, The cleanest path for what you're describing — one codebase that feels native in a desktop browser and installs on iOS and Android — is Flutter. Flutter web has matured a lot, and you avoid the Ionic webview compromise and the React Native + separate web setup. One repo, one design system, three targets. Proposed stack: - Flutter (iOS, Android, web PWA + installable) - Supabase or Firebase for auth + real-time databases (Supabase if you want SQL later, Firebase for fastest push setup) - FCM + APNs for cloud messaging, with backend-tunable topics/segments - GraphQL via Hasura, or REST via Supabase — depending on your data shape - Codemagic for App Store + Play deployment pipelines I've shipped Flutter apps with Firebase auth, offline-first sync, and FCM running in production across all three stores, and run a 5★ profile across 72 reviews here. One thing worth deciding upfront: should the web version be a true PWA (installable, offline), or just a responsive site that mirrors the mobile app? It changes how I structure the sync layer. Happy to send a written proposal with milestones for auth, sync, and notifications before the call. Asif
$1,500 USD in 7 days
6.4
6.4

Hello, I hope you are doing well. I understand that you are looking to build a CROSS PLATFORM 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

Hi, We’d love to refine and deploy your cross-platform application with a focus on performance, scalability, and seamless user experience. Doomshell Software Pvt. Ltd. is an IT company with 20+ years of experience, delivering robust web and mobile applications. Our approach: 1. Cross-Platform Architecture • Recommend best-fit framework (React Native/Flutter) • Unified codebase for web, iOS, and Android • Clean, scalable structure for future updates 2. Core Feature Implementation • Secure authentication with session management • Real-time data sync across devices using APIs/DB • Reliable push notifications with backend control 3. Backend & API Layer • REST/GraphQL APIs for smooth communication • Integration with real-time databases and cloud messaging • Secure and optimized data handling 4. Deployment & Optimization • CI/CD setup for App Store, Play Store, and web • Performance tuning and testing across devices • Production-ready, well-documented codebase Why Doomshell: • Strong expertise in cross-platform app development • Experience in real-time systems, APIs, and cloud integration • Focus on stability, scalability, and clean delivery Quick questions: • Is your current AI-built version structured for API integration and scalable refactoring? • Do you prefer Firebase-based sync/notifications or a custom backend-driven approach? We’re ready to deliver a reliable, production-ready cross-platform solution. Best regards
$600 USD in 7 days
6.3
6.3

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