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The goal is to release a polished utility app that works perfectly on both Android and any modern web browser. Core requirements are straightforward but non-negotiable: secure user authentication, real-time push notifications, and dependable cloud-based data storage. You are free to recommend the stack you trust most—whether that’s a shared Flutter codebase, Kotlin for Android paired with a React or Vue SPA, and a Firebase, Supabase, or AWS back end—as long as the result is maintainable and well-documented. Deliverables • Production-ready Android APK • Responsive web build deployed to a staging URL • Full source code in a Git repo with clear README • Brief hand-off session walking me through setup and future updates Acceptance check 1. I can create an account, sign in, and stay authenticated across web and mobile. 2. When a server-side event is triggered, the device and browser each receive a push notification instantly. 3. Data I enter on one platform is visible and editable on the other without conflict. Include an outline of your proposed architecture, toolset, and timeline in your bid so we can move quickly toward an MVP and iterate from there.
Project ID: 40536903
72 proposals
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Active 22 hours ago
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72 freelancers are bidding on average ₹24,575 INR for this job

Hi, This is absolutely achievable, and I already have a clear architecture in mind. For speed, scalability, and lower maintenance costs, I would build this using Flutter (Android + Web from a single codebase) with Firebase/Supabase handling authentication, real-time database synchronization, cloud storage, and push notifications. This ensures users stay seamlessly synced across devices while keeping the platform easy to extend in future releases. Your three acceptance criteria—cross-platform authentication, instant notifications, and real-time data synchronization—are exactly the areas I focus on when building production applications. Rather than just delivering code, my goal is to deliver a stable MVP that users can actually rely on from day one. I have experience building business applications with secure authentication, real-time updates, push notifications, dashboards, and cloud-based architectures, and I can confidently take this from planning to deployment, including Android APK, web deployment, documentation, and handover. I’d be happy to walk you through the proposed architecture, timeline, and development roadmap. Once we discuss the utility app's exact purpose, I can provide a practical plan and realistic delivery schedule immediately. Rajesh
₹25,000 INR in 7 days
9.5
9.5

With a proven track record in developing cross-platform utility apps, I understand the critical need for robust user authentication, real-time notifications, and seamless data synchronization across Android and web platforms. My experience with Flutter for a shared codebase and Firebase for cloud-based storage aligns perfectly with your project requirements. Could you share specific preferences regarding the UI/UX design style you envision for the app? Regards, Yogesh Kumar
₹24,740 INR in 8 days
8.4
8.4

Hello, I have 10+ years of experience building cross-platform applications using Flutter, ReactJS, Vue.js, Laravel, Node.js, Firebase, Supabase, and AWS. For your requirements, I would recommend Flutter for a single codebase supporting both Android and Web, combined with Firebase Authentication, Cloud Firestore, Firebase Cloud Messaging, and Cloud Functions. This approach provides secure authentication, real-time data synchronization, push notifications, and simplified long-term maintenance. Proposed Architecture: * Frontend: Flutter (Android + Web) * Authentication: Firebase Authentication * Database: Cloud Firestore * Push Notifications: Firebase Cloud Messaging * Backend Logic: Firebase Cloud Functions * Source Control: GitHub/GitLab The delivered solution will include a production-ready Android APK, responsive web deployment, complete source code, documentation, and a hand-off session to ensure smooth future maintenance and enhancements. Best regards
₹25,000 INR in 7 days
7.1
7.1

Your acceptance criteria reveal the real challenge here - cross-platform state synchronization without race conditions. Most developers miss this: if two clients edit the same record simultaneously, you need conflict resolution logic or you'll corrupt data. I've built 8 cross-platform apps where this exact scenario caused production bugs. Quick question - what's your expected concurrent user load at launch, and do you have existing backend infrastructure I need to integrate with, or are we starting fresh? Here's the architectural approach: - FLUTTER + DART: Single codebase targeting Android and web, reducing maintenance overhead by 60% compared to separate Kotlin and Vue builds while keeping UI consistent. - FIREBASE AUTH + FIRESTORE: Built-in JWT handling, real-time listeners that auto-sync data across devices, and offline persistence so edits queue when network drops. - CLOUD MESSAGING: FCM for Android push notifications and web push API for browsers, both triggered by Firestore security rules to guarantee instant delivery under 500ms. - OPTIMISTIC UPDATES: Implement last-write-wins with server timestamps to handle concurrent edits without locking the UI or showing stale data. I've shipped 5 Flutter apps that scaled from MVP to 20K+ users without rewriting the core architecture. Let's schedule a 15-minute call to align on data models and notification triggers before I draft the technical spec.
₹22,500 INR in 7 days
6.7
6.7

Hi I have read your requirements and I am sure 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 Logical Soft Tech Pvt Ltd, Indore(M.P)
₹25,000 INR in 7 days
6.6
6.6

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, Java, Mobile App Development, Android, Kotlin, Web Development, Vue.js, Flutter Lets connect in chat so that We discuss further. Regards
₹12,500 INR in 3 days
6.3
6.3

Hi, I can build this utility app using Flutter for Android + Web with Firebase for auth, real-time database/cloud storage, and push notifications. The app will support shared login, synced data across platforms, instant notifications, and clean documented source code. I’ll deliver Android APK, web staging build, Git repo, README, and handoff support. Ready to discuss MVP scope and timeline.
₹30,000 INR in 7 days
6.4
6.4

With over a decade's worth of experience and a 100+ successful projects under my belt, I am confidently equipped to build your sought-after cross-platform utility app. Evidently, the project requires a reliable, secure logging system and real-time push notifications - elements which align with my expertise in mobile app development using Android and Java. I understand how crucial efficient data storage is for the optimum functioning of your app. This is why I highly endorse the use of cloud-based solutions such as Firebase, AWS or Supabase to meet your standards of security and reliability. Building on such platforms will guarantee seamless data synchronization between web and mobile versions - meaning you can access, alter and view data from either source without glitches. In terms of architecture, an intelligent fusion of Flutter for the Android side and Vue.js for the web version promises tech-savviness along with a maintainable codebase. A detailed documentation of the entire source code in a Git repo combined with a thorough hand-off session at the end will ensure your full control over setup and future updates. Award me this project, and I promise to turn your vision into reality by delivering within tight deadlines and giving long-term support beyond the initial MVP phase. Let's walk this rewarding journey together!
₹25,000 INR in 7 days
6.4
6.4

Hi, I'm Ravi Mishra. Expert in cross-platform architecture. I will build your utility app using a unified Flutter codebase and Firebase for real-time data sync, secure auth, and instant push notifications across web and Android. You’ll get a clean, production-ready MVP on time. Let’s start!
₹25,000 INR in 7 days
6.2
6.2

Hello, I reviewed your Android & Web Utility App project and it immediately stood out because utility applications require a balance of simplicity, performance, and reliability across both mobile and web platforms. Problem: Many utility apps become difficult to maintain when Android and web versions are developed separately, resulting in inconsistent features, duplicated effort, and poor user experience. Solution: I can develop a unified Android and Web application with a clean architecture, responsive design, secure APIs, and scalable backend services. My experience includes Flutter, React, Node.js, Laravel, REST APIs, dashboards, business utilities, and cross-platform applications that deliver a consistent experience across devices. Result: You will receive a fast, user-friendly application with synchronized functionality across Android and Web, making it easier to manage, scale, and support over time. A few questions: • What is the primary purpose of the utility app? • Do you prefer Flutter for cross-platform development or separate Android/Web technologies? • Are user accounts, subscriptions, payments, or admin dashboards required? I can start immediately and would be happy to review the requirements and suggest the most efficient development approach. Thanks
₹20,000 INR in 7 days
5.6
5.6

Being a seasoned developer with over a decade of experience, I believe I'm the perfect fit for your Android & Web Utility App project. My expertise in constructing high-performance SaaS platforms, custom web applications, and mobile solutions puts me in a unique position to understand and translate your requirements into a functional reality. With regards to your core requirements of secure user authentication, real-time push notifications, and dependable cloud-based data storage, rest assured that I will deliver nothing short of perfection. My "business-first" approach differentiates me from other developers – I don't just write code; rather, I architect systems for scalability and security. Having managed 40+ long-term client partnerships successfully, I understand the value of stability, security, and continuous growth for their digital assets. In terms of technology preferences for your project, I have hands-on experience with multiple tech stacks like Flutter, Kotlin, React, Vue, Firebase as well as Supabase or AWS back end. It would allow us to choose the stack that best aligns with your needs, ensuring maintainable and well-documented output. To complement my technical skills and showcase my dedication to quality delivery in a timely manner, hiring me will ensure you receive well-commented source code in a Git repo along with a brief hand-off session walking through setup and future updates. By partnering with me
₹25,000 INR in 7 days
5.6
5.6

With a name as unique as Jaimish, rest assured that I will bring an exceptional touch to your Android and web utility app project. As a seasoned Full-Stack Developer skillful in mobile app development, especially with Flutter and React Native, I pledge to deliver a polished, secure, and high-performing app that meets all your outlined requirements. My proficiency with Android development using Kotlin would ensure a reliable APK while my adeptness with Vue.js and PHP guarantees a responsive web build. I understand the importance of real-time push notifications and cloud-based data storage for your project; that's why I am well-versed in Firebase, Supabase, AWS, and many other cloud service providers. Furthermore, my seven years of experience building production-grade web applications similar to yours have honed my skills in secure user authentication—something pivotal to your project. Beyond my technical abilities lie strong communication skills and a penchant for clear documentation. I will provide you with full access to the source code in a Git repo alongside a detailed README. Additionally, I am committed to ensuring your satisfaction even after the project completion through a comprehensive hand-off session which I offer to walk you through the setup process and future updates. Choose me; let's build something incredible together.
₹35,000 INR in 7 days
5.4
5.4

✋ Hi there. I can build your utility app with Flutter for Android and React for web, using a shared backend with Firebase or Supabase. ✔️ I have built similar cross-platform utility apps with real-time sync and push notifications. I will develop secure authentication, cloud data storage with real-time sync across platforms, and push notifications for both mobile and web, then deliver a production-ready APK and deployed web build. Click the chat button for my architecture proposal and timeline. Best regards, Mykhaylo
₹25,000 INR in 7 days
5.5
5.5

Hi, I can build your utility application for both Android and web using a shared Flutter codebase backed by Firebase, which provides a fast development cycle, consistent user experience, secure authentication, real time data synchronization, cloud storage, and push notifications across platforms. The architecture would include Flutter for Android and Web, Firebase Authentication for user management, Cloud Firestore for real time data storage, Firebase Cloud Messaging for instant notifications, and a structured Git repository with clean, documented code. This approach ensures that data entered on one platform is immediately available on the other while maintaining scalability and ease of maintenance. The deliverables will include a production ready Android APK, deployed web staging build, complete source code, setup documentation, and a handoff session covering deployment and future updates. I follow a milestone based workflow with regular progress updates to ensure a smooth path from MVP to future enhancements. Best Regards, Solves Inn
₹12,500 INR in 1 day
4.7
4.7

With my comprehensive knowledge and practical experience across Android and web development domains, I am well-positioned to manage your project with great finesse. Having developed several apps with real-time functionality, I am well-adept in the nuances of secure user authentication and dependable cloud-based data storage you require. Moreover, my ability to work with a variety of tech stacks such as Flutter, Java, PHP will ensure we use the best solution available. I propose a combination of Kotlin for your Android app together with either React or Vue on the web and employing an efficient backend such as Firebase, Supabase, or AWS as per your preference. This blend not only assures seamless interoperability between web and mobile versions, but also allows for shared codebase and hence quicker development cycles. My commitment to clean code practices aligns with your need for maintainability. Furthermore, I am skilled at producing robust APIs that can integrate smoothly with various external services ensuring your app's functionality is future-proofed and expandable. With me on board, you'll have not just a reliable developer but a partner keen to understand your vision building
₹12,500 INR in 7 days
4.0
4.0

Hi there, You’re in the ABSOLUTE RIGHT PLACE. I’ve successfully delivered MULTIPLE HIGH-IMPACT PROJECTS JUST LIKE THIS and know EXACTLY how to execute it FLAWLESSLY, EFFICIENTLY, AND FROM DAY ONE. To clearly lock down the SCOPE, TIMELINE, AND PRICING, I’ll need to ask a few CRITICAL QUESTIONS. Unfortunately, Freelancer’s 1500-CHARACTER LIMIT doesn’t allow me to break everything down with the CLARITY AND PRECISION this project deserves. Let’s jump on CHAT so I can show you my PROVEN TRACK RECORD, walk you through the REAL, MEASURABLE RESULTS I’ve delivered, and present a CLEAR, STRATEGIC ACTION PLAN tailored specifically for your project. You’ll immediately see why my approach is DIFFERENT, STREAMLINED, AND HIGHLY EFFECTIVE. If you’re serious about getting this done RIGHT THE FIRST TIME, I’m READY TO MOVE FAST AND DELIVER RESULTS. Looking forward to CONNECTING, COLLABORATING, AND WINNING TOGETHER. Cheers, Mayank Sahu
₹25,000 INR in 7 days
4.1
4.1

Hi, there. Hope you are doing well. I reviewed your requirements for the Android and web utility application and understand that you need a reliable cross-platform solution with secure authentication, real-time notifications, and synchronized cloud data. I have experience developing mobile and web applications using Flutter, Kotlin, React-based solutions, and cloud backends, including authentication systems, push notification services, API integrations, and scalable database architectures. For this project, I would recommend a maintainable architecture with a shared codebase approach where possible, combined with a secure backend service such as Firebase, Supabase, or a custom API depending on your future requirements. The application will include user registration, login persistence, secure session handling, real-time data synchronization, and push notification delivery across both Android devices and web browsers. I will focus on creating a clean and responsive interface that provides a consistent experience across platforms while keeping the codebase organized and easy to extend. The project will be delivered with a production-ready APK, deployed web version, complete source code in Git, documentation, and a clear handover covering setup and future updates. I am confident in building a stable MVP that meets your acceptance criteria and provides a strong foundation for future improvements. Thanks.
₹15,000 INR in 4 days
3.9
3.9

With my enviable blend of technical proficiency and extensive experience developing top-notch web and mobile applications, I'm prepared to take your utility app project to new heights. My proficiency in Flutter, Java paired with a React or Vue SPA, and my AWS back end expertise perfectly aligns with your technology requirements. This fluency ensures you will get a maintainable, well-documented, and high-performing application across both Android and web platforms. My approach involves discussing with clients to gain a comprehensive understanding of their needs and suggesting improvements. We'll start by outlining an architecture that perfectly fits your project's objectives, selects the best tools for accelerating development, and matches your future maintenance needs. Since a project's lifecycle extends beyond deployment, my promise to you is an inclusive hand-off session walking through the setup process and outlining future update procedures.
₹12,500 INR in 7 days
3.7
3.7

With years of experience in both Android and web development, I am confident that I can deliver a robust and user-friendly utility app that caters to your specific requirements. My extensive knowledge in platforms such as Flutter, Kotlin, React, Vue SPA, and my proficiency in using Firebase, Supabase, or AWS for backend services establish myself as a suitable candidate for this project. In terms of timeline and project management, I'm known for delivering production-ready deliverables on time without compromising quality. Building an MVP swiftly is always my primary goal so we can iterate effectively based on user feedback and market needs. Apart from the technical aspects, I also emphasize clear communication progress updates and concise documentation which will be provided as part of the full source code along with a thorough hand-off session for a seamless future transition. In conclusion, your search for an experienced and reliable developer ends here. My proactive approach, breadth of skills across mobile (Flutter | Android) and web (Vue.js | PHP), expertise with the tools you specifically mentioned (Firebase | Supabase | AWS) and strategic mindset makes me perfectly poised to benefit your project's success. Let's connect to discuss the detailed outline of your project!
₹12,500 INR in 2 days
3.7
3.7

Hello, I can develop your utility app for both Android and web with a clean, maintainable architecture focused on performance, security, and real-time functionality. My recommended approach is a Flutter-based cross-platform app for Android + web, combined with Firebase or Supabase as the backend. This ensures a single codebase, real-time sync, secure authentication, push notifications, and scalable cloud storage with minimal maintenance overhead. Core features I will implement include secure login/authentication, persistent user sessions across devices, real-time data sync, and instant push notifications for both mobile and web. All data will remain consistent across platforms without conflicts. Deliverables will include a production-ready Android APK, a responsive web build deployed to a staging environment, a fully documented Git repository, and a short handover session covering setup and future updates. Looking forward to your response in the chat box. Thanks.
₹12,500 INR in 9 days
3.5
3.5

Pune, India
Member since Jun 24, 2026
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