Audio Streaming & Offline Playback App

@AwaisChaudhry

Hello, I’m Muhammad Awais. I will build a native iOS (Swift) and Android (Kotlin) audio app with offline playback, background listening, and a WebView bridge that keeps the web app and native layer in sync. I’ll implement the playback core with AVFoundation on iOS and ExoPlayer on Android, store playback state locally, and expose it to the WebView via a bidirectional bridge. It will stream MP3/AAC/M4A, provide play/pause/seek, speed and volume controls, and show progress. It will support background and lock-screen controls, audio focus, and graceful interruptions. Offline downloads will be queued and stored with resume support, and streaming will seamlessly switch to offline when needed. The WebView will get real-time state updates and send commands through a JavaScript bridge; on reconnect, a fast resync will push the full state. Deliverables include native modules for both platforms, integration docs, and thorough device testing. What formats and DRM constraints apply for offline playback? Do you provide example code or API contract for the WebView integration? What happens if the user force-quits the app? (Expected: playback stops) How should offline storage limits be managed and cleanup be handled? Do you require automated tests or a QA plan for both iOS and Android? Best regards,

@corpmember29

HELLO!! I HAVE READ YOUR REQUIREMENTS CAREFULLY AND UNDERSTOOD THE PROJECT SCOPE VERY WELL AND WILL START WORKING ACCORDINGLY IN STAGES. I am a mobile software engineer with 10+ years of experience delivering native iOS (Swift) and Android (Kotlin) applications with advanced audio streaming, offline playback, background services, and WebView–native synchronization. I have built audiobook, podcast, and media apps using AVFoundation, ExoPlayer, MediaSession, foreground services, and robust JavaScript bridge architectures where the native layer is the single source of truth. I will implement a production-ready audio engine supporting background/lock-screen playback, offline downloads, interruption handling, fast resync after restarts, and real-time bidirectional WebView communication via JSON. The solution will be optimized for performance, battery efficiency, and OS compliance (iOS 14+ / Android 8+), with clean, well-commented code, setup scripts, and clear integration documentation. I WILL PROVIDE 2 YEARS OF FREE ONGOING SUPPORT, COMPLETE SOURCE CODE OWNERSHIP, AND WILL WORK USING AGILE METHODOLOGY, ASSISTING FROM INITIAL INTEGRATION TO STABLE HAND-OFF. Post-delivery support includes bug fixes during integration and technical guidance for maintenance. I eagerly await your positive response. Thanks

@Julian29

Hello, HAVE HANDS-ON EXPERIENCE WITH SUCH PROJECT I have 11+ years of proven experience in native iOS and Android audio applications, and I confidently understand the requirement. The goal is to deliver a robust, mobile-first audio streaming app with offline playback, background operation, and seamless webview integration for a smooth user experience. -->> Native audio playback (AVPlayer/ExoPlayer) with play/pause/seek, speed control, and progress reporting -->> Background and lock-screen controls, including notifications and audio focus handling -->> Offline download management with storage tracking and resume capabilities -->> Webview bridge for bidirectional state sync and fast resync on reload -->> Persistent playback state across app restarts My approach ensures clean, modular native code with efficient memory/battery usage, secure offline storage, automated tests, and detailed integration documentation for your webview. I have a few clarifying questions regarding preferred audio formats, max offline storage, and your testing expectations to finalize scope and timeline. Thanks & regards, Julian

@kodecubeinfosys

Hello Sir, Greetings from Kodecube Infosys! We’re thrilled to submit our proposal for your mobile app development project. At Kodecube Infosys, we specialize in building high-performance, scalable, and user-friendly Android and iOS applications. With over 10 years of experience, we’ve successfully delivered 100+ apps across diverse domains. Our team of 50+ skilled developers and designers is proficient in modern frameworks like React Native, Flutter, and native technologies such as Java/Kotlin (Android Studio) and Swift/Objective-C (Xcode). Our Mobile App Expertise: • Cross-Platform Apps: React Native, Flutter – faster delivery, one codebase • Native Apps: Android (Java/Kotlin), iOS (Swift/Obj-C) – platform-optimized • Custom Features: Push notifications, in-app payments (Stripe, Razorpay, PayPal), Firebase (DB, Auth), social logins, Google Maps, camera/location access • UI/UX Design: Modern, intuitive, mobile-optimized interfaces • Post-launch Support: Maintenance, updates, feature enhancements Whether launching a new app or improving an existing one, we ensure smooth performance, modern design, and user satisfaction. Let’s connect to discuss how we can bring your vision to life. Best Regards, Kodecube Infosys

@Microlent

Hello, I’ve reviewed your technical brief carefully. This is a native, audio-first mobile implementation where correctness, background behavior, and state synchronization matter more than UI. The scope is clear and well-defined, and I’m comfortable executing it as specified without scope drift. I’ve built native iOS and Android audio players with background playback, offline downloads, lock-screen controls, and WebView bridges where the native layer is the source of truth. My approach • Native Swift using AVFoundation and MPNowPlayingInfoCenter on iOS • Native Kotlin using ExoPlayer, foreground service, and MediaSession on Android • Native-managed playback state persisted locally and pushed to WebView on interval and reconnect • Bidirectional JSON-based WebView bridge with fast resync on reload • Robust offline download manager with storage tracking and seamless stream to offline switching Answers to your questions 1. Supported formats: MP3, AAC, M4A 2. Yes, I provide clear JavaScript bridge examples and message specs 3. If the app is force-quit, playback stops as expected 4. iOS background networking tied strictly to active audio playback 5. Offline storage limits handled via configurable quotas and cleanup controls Deliverables will match your list exactly, including native modules, integration documentation, and tested builds on physical devices. If this aligns, I can confirm timeline and next steps immediately. Best regards, Jenifer

@kamran2012

Hello there, I can develop a native iOS and Android audio streaming app with offline playback, background functionality, and seamless webview integration. The app will support Swift (iOS 14+) and Kotlin (Android 8.0+), utilizing AVFoundation and ExoPlayer for robust audio handling. This includes essential playback controls, lock-screen features, and efficient state management. Offline capabilities will allow users to download, manage, and play audio without network connection, while maintaining progress across sessions. I'll ensure adaptive buffering for smooth streaming, handle network interruptions gracefully, and implement efficient memory and battery usage. The bidirectional webview communication will keep the app and web UI in sync, providing real-time state updates and control responsiveness. Questions: • What specific audio formats are prioritized beyond MP3/AAC/M4A? • How do you envision handling storage limits for offline content? I am committed to delivering a reliable app with comprehensive testing and post-delivery support, ensuring seamless integration and user satisfaction. Thanks and best regards, Kamran

@nikhilgarg96

Hi With over a decade of experience as a mobile developer, including extensive expertise in Swift and iOS development, I am fully equipped to handle your audio streaming and offline playback app project. Coming on board, you can expect nothing short of utmost professionalism and guaranteed delivery of not just codes but innovative solutions that addresses the very heart of your project's needs. In your project description, you emphasized on the need for a well-integrated application that not only streams audio contents with offline capabilities but also maintains your desired state management and sync processes. With my proficiency in handling native as the source of truth while strategically ensuring seamless communication via postMessage between the native and webview parts of an application, I'm confident in my ability to make this crucial aspect of your application work flawlessly. Thanks...

@rbtech1984

Hello There!!! ⚜⭐⭐⭐⭐⚜(( Native Audio Streaming App with Offline Playback and Webview Sync ))⚜⭐⭐⭐⭐⚜ Creating a seamless audio experience that supports streaming, offline playback, and real-time webview integration ensures users can listen uninterrupted across devices and network conditions. You need native iOS (Swift) and Android (Kotlin) modules handling playback, background and lock screen controls, offline downloads, and a robust communication bridge with your web app. I bring experience building native media apps with AVFoundation and ExoPlayer, implementing background services, offline storage management, and real-time state sync with webviews. My focus is smooth playback, fast resync, and low resource consumption. Key features: • Background and lock screen playback with media controls • Offline download manager with resume and storage handling • Webview bridge for bidirectional state and control sync I can deliver a stable, tested solution with documentation and post-delivery support for seamless integration. Warm Regards, Farhin B.

@abhisaini0188

Hello, Thank you so much for posting this opportunity. It sounds like a great fit, and I’d love to be part of it! I’ve worked on similar projects before, and I’m confident I can bring real value to your project. I’m passionate about what I do and always aim to deliver work that’s not only high-quality but also makes things easier and smoother for my clients. Feel free to take a quick look at my profile to see some of the work I’ve done in the past. If it feels like a good match, I’d be happy to chat further about your project and how I can help bring it to life. I’m available to get started right away and will give this project my full attention from day one. Let’s connect and see how we can make this a success together! Looking forward to hearing from you soon. With Regards! Abhishek Saini

@Fawadkaleem

Having successfully developed cross-platform mobile apps with Flutter and React Native, I am confident in my ability to deliver an exceptional streaming app for both iOS and Android as required by your project. I'm well-versed in the native languages of Swift and Kotlin, which are essential for this project's detailed technical specifications. My proficiency in the audio frameworks AVFoundation (iOS) and ExoPlayer/MediaPlayer (Android) will ensure seamless playback, even at varying speeds. In terms of maintaining state management, I have extensive experience with native as the source of truth and excellent webview communication with fast resync processes similar to what you're looking for. My understanding of efficient network handling will enable adaptive buffering and ensure the app easily recovers from network interruptions, continuing playback seamlessly. Finally, I prioritize clean architecture, high performance, low battery consumption, efficient memory usage, minimal audio dropouts or stuttering, and fast track loading which deliver a smooth experience like your project needs. With deep expertise in mobile app development across platforms and a strong commitment to long-term maintainability, I'm ready to build an app that truly meets your requirements and elevates your user experience. Let's discuss how we can turn this vision into a brilliant reality!

@mobiwebsolutions

Hi There!!! !!>>> THE PROJECT GOAL IS TO BUILD A NATIVE AUDIO STREAMING APP WITH OFFLINE PLAYBACK AND WEBVIEW SYNC <<<!! I have studied your project description very well and understand you need a robust iOS and Android app with streaming, offline playback, background audio, and real-time webview integration. I am the best fit because I can deliver seamless audio performance with precise state management and native optimizations. Native audio playback with background & lock screen support Offline download manager with resume and storage handling Real-time webview integration and state synchronization I provide basic services like design, database management, testing, source code delivery, and documentation for easy maintenance. I have 9+ years experience as a full stack developer and have delivered mobile apps with streaming audio, offline capabilities, and synchronized webview communication. Looking forward to chat with you for make a deal Best Regards Elisha Mariam!

@ZohaibRoy

⭐⭐⭐⭐⭐ Create a Seamless Audio Streaming App for iOS and Android ❇️ Hi My Friend, I hope you're doing well. I've reviewed your project requirements and noticed you're looking for a native audio streaming app for iOS and Android. Look no further; Zohaib is here to assist you! My team has successfully completed 50+ similar projects for audio applications. We will create a user-friendly app with offline capabilities and smooth playback features. ➡️ Why Me? I can easily build your audio streaming mobile app as I have 5 years of experience in mobile app development, specializing in iOS and Android platforms. My expertise includes Swift, Kotlin, audio playback, and webview integration. Besides, I have a strong grip on other relevant technologies, ensuring a comprehensive approach to your project. ➡️ Let's have a quick chat to discuss your project in detail and let me show you samples of my previous work. Looking forward to discussing this with you in chat. ➡️ Skills & Experience: ✅ Swift Development ✅ Kotlin Development ✅ Audio Streaming ✅ Offline Playback ✅ Webview Integration ✅ Background Playback ✅ UI/UX Design ✅ API Integration ✅ State Management ✅ Performance Optimization ✅ Testing & Debugging ✅ User Support Waiting for your response! Best Regards, Zohaib

@mahig47

Hello! As per your project post, you are looking to build a Native Audio Streaming Mobile Application for iOS and Android focused on audiobooks and podcasts, with strong offline playback, background audio, and deep webview integration. The platform will rely on the native layer as the single source of truth for playback while keeping a web based interface fully synchronized in real time for a smooth and reliable listening experience. My focus will be on delivering a stable, high performance native audio architecture on both platforms. Core features will include streaming playback with seek and speed controls, background and lock screen media handling, offline downloads with resume support, seamless switching between online and offline modes, and persistent playback state across app restarts. I specialize in native iOS development using Swift and AVFoundation, and Android development using Kotlin with ExoPlayer and MediaSession. My approach emphasizes efficient state management, low battery usage, resilient network handling, and clean JSON based bridge communication. The codebase will be well structured, documented, and production ready. Let’s connect to discuss playback edge cases, webview communication flow, and milestone planning to deliver a reliable and high quality audio streaming application. Best regards, Nikita Gupta.

@TayyabNawaz1

⭐⭐⭐⭐⭐With over 8 years in web and app development, my proficiency in Android and iOS (Swift) makes me a great fit for this audio streaming mobile app project. I have hands-on experience creating efficient, reliable, and user-centered apps. Precisely, the Audio Frameworks such as AVFoundation (AVPlayer/AVQueuePlayer) for iOS and ExoPlayer/MediaPlayer for Android have been my everyday companions when it comes to handling audio playback tasks, which perfectly aligns with the core requirements of your project. Moreover, I'm well-versed in implementing background and lock screen features to ensure uninterrupted playback experiences on both platforms. My familiarity with native communication frameworks such as postMessage in conjunction with JSON also guarantees smooth integration between the native app and the web view component. Finally, my knack for performance optimization is essential for this project's network and performance components. Designing adaptive buffering systems, from preloading chunks to managing graceful network interruptions, has been an integral part of my previous projects. My commitment to low battery consumption, efficient memory usage, and fast track loading further guarantees a stellar streaming experience. Let me put my skills to work in building this audio streaming app that will surpass all your expectations!

@shushmobiweb6

Hello!! I HAVE DEVELOPED AUDIO STREAMING APPS BEFORE ! With over eight years of experience building high-performance mobile applications, I understand your need for a seamless audio streaming and offline playback solution for both iOS and Android. Your requirement for native playback, background operation, offline mode, and real-time webview synchronization aligns perfectly with my expertise. → Deliver uninterrupted streaming with adaptive buffering and fast track loading → Enable offline downloads with persistent playback position and queue management → Maintain real-time sync between native app and webview for smooth user interaction Key Features : • Native audio playback engine (AVPlayer on iOS, ExoPlayer on Android) with background and lock-screen controls • Offline download manager with storage and progress tracking • Webview bridge for bidirectional state updates and commands • Persistent playback state across restarts and interruptions These components work together to ensure users enjoy a smooth listening experience, with fast resync after app restarts, uninterrupted playback in background or lock screen, and seamless transition between streaming and offline mode. Unlimited changes in UI design until your satisfaction, post-launch support. I look forward to collaborating closely to bring your vision to life and ensure the final product delivers outstanding results. Best regards, Sushma S.

@Apurva510

Hi Drawing from my 7+ years of experience, I have successfully delivered numerous projects in line with your project needs. With a strong focus on quality assurance and providing a positive user experience, I'm confident in my ability to develop a native iOS and Android application for your audio streaming needs. Given the technical specifications outlined, I believe my fluency in Swift, Kotlin, AVFoundation, ExoPlayer, WKWebView and JavascriptInterface make me a perfect fit for your project. Efficiency and performance are non-negotiable aspects of any beneficial audio streaming app. While delivering a seamless audio experience regardless of network interruptions and battery consumption are critical, so too is a swift loading time, perceptive to good and bad connections. Through employing adaptive buffering techniques and efficient memory usage strategies, I guarantee an enhanced user experience that is free of audio dropouts or stuttering. My understanding of these key functionalities and dedication to delivering them will not only meet your requirements but exceed your customers' expectations as well. Finally, one aspect that inherently reflects my ability to develop this app is my competence in persistent online-offline modes - as mirroring native state management to webview handles Thanks....

@fullstack0407

** NO UPFRONT PAYMENT ** I can start immediately My name is Amarjeet Singh I have read your job I am very familiar & specialized in Mobile App Development Swift Kotlin iOS Development Mobile Development Android App Development I am very excited to see your job posting as I am confident that I am a perfect fit for what you are looking for I have checked out all your requirements regarding application development and we can help you. AM highly interested in your project, as I have worked on many similar projects. Apart from this i have make good use of APIs and web services. I have integrated API and web services. If you award me the project I'd be very happy to discuss this further and get started for you as soon as possible. You can see an example of one of those projects in my portfolio here: https://www.freelancer.in/u/fullstack0407

@SahseeTechnology

Hi, I can deliver a production-ready native iOS (Swift) and Android (Kotlin) audio streaming application that fully meets your specifications for background playback, offline downloads, lock-screen controls, and real-time WebView synchronization. Approach: - Implement a robust native audio engine with speed control, seeking, buffering optimization, and resume support - Enable background & lock-screen playback (MPNowPlayingInfoCenter / MediaSessionCompat) - Build a reliable offline download manager with storage tracking and seamless online/offline switching - Create a bidirectional WebView bridge with JSON messaging, fast resync, and graceful error handling - Persist playback state, preferences, and download metadata across restarts Deliverables: - Fully documented iOS & Android native modules - WebView JavaScript API & message protocol docs - 2–4 weeks post-delivery support Answers: - Supported formats: MP3, AAC, M4A - WebView bridge examples included - Force-quit stops playback (as expected) - iOS background networking tied to audio session - Offline limits configurable & user-managed - Automated tests where applicable - References available on request I’m comfortable working with detailed specs like this and delivering stable, maintainable, App-Store-safe implementations. Happy to discuss timeline, milestones, and next steps.

@Dliteinformation

With over a decade of experience at Dlite Info Tech, my development skills are the right match for your native iOS and Android audio streaming app. I've built multiple media-intensive applications with robust offline playback and on-demand streaming capabilities such as resizable playback controls to support audiobooks/podcasts and dynamic operations like play/pause, stop, and track progress monitoring (position, duration, buffering state) to guarantee exceptional user experiences. As for webview communication, I am well-versed in implementing postMessage bidirectional communication protocols for instantaneous synchronization between the native layer and webview. Incorporating essential features like track loading, play/pause/seek commands, speed changes, download operations etc have always been my priority! Thus,I guarantee not just clean coding but high-performing solutions that deliver results with real-time response to control actions. Lastly, at Dlite Info Tech we emphasize on delivering world-class services that drive success. My mission is to transform complex tech details into user-friendly solutions. I won't just fix problems—I'll go beyond to solve them efficiently and creatively ensuring your project stays robust at scale.I would love the opportunity to bring this same level of dedication and energy to your project! Let's join hands and build something extraordinary together!