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I want a simple and straightforward mobile app that keeps everyone’s phones in sync while we listen to a single playlist I provide (no Spotify, Apple Music, or YouTube integrations needed). The core flow is simple: • One device starts the session and streams the tracks from a central source I’ll supply. • Friends on either iOS or Android scan a QR code, tap an invite link, or use any similarly painless method you suggest and immediately join the stream at the exact point the host is hearing. • Late joiners shouldn’t have to fuss with log-ins, passwords, or complex setup; they tap, and the audio picks up right where the group currently is. A minimal interface with basic play/pause controls is enough. The host can handle starting or skipping tracks; everyone else just listens. Deliverables: 1. iOS and Android builds ready for TestFlight / internal testing. 2. Lightweight backend or local server component that serves the playlist files. 3. Clear setup documentation so I can add or update tracks myself. 4. Source code with brief inline comments. I’m happy to discuss architecture choices—WebRTC, socket-based syncing, or any other approach you trust—as long as users experience reasonably closely-synched group playback and effortless entry into the session. The simpler the better. :)
Project ID: 40500901
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228 freelancers are bidding on average $521 CAD for this job

Great to connect with you, I specialize in cross-platform mobile app development and can build a simple iOS and Android app for synchronized group audio playback. Users can join instantly via QR code or invite link, while the host controls playback and everyone stays in sync with minimal latency. I’ll deliver the mobile apps, backend for playlist hosting and syncing, source code, and clear setup documentation. Let’s connect and discuss the best approach for your project! Check out my profile: https://www.freelancer.in/u/infowider11 Thanks, Shweta*
$510 CAD in 14 days
9.3
9.3

Hi — Elias here from Miami. I see you're looking to develop a real-time shared playlist mobile app. The goal here seems to be ensuring seamless synchronization among users while enjoying music together. What usually matters most here is achieving reliable performance, especially in maintaining sync across devices. A common issue in systems like this is managing network latency and ensuring that all users experience the same playback without interruptions. The tricky part is usually handling state management so that every change reflects instantly for all users. My approach would involve designing a robust backend that supports real-time data synchronization while being scalable for future features. I would prioritize a clear architecture that allows easy updates and maintains performance under load. In the past, I have worked on similar mobile applications where real-time updates were critical, ensuring both usability and stability. A few questions to better understand the scope: Q1 – What user roles will be involved in the app (e.g., admin vs. regular users)? Q2 – How do you envision handling user permissions for playlist management? Q3 – Are there specific music streaming services you want to integrate with? Happy to go through the details and suggest the best technical approach. Looking forward to hearing from you.
$500 CAD in 5 days
8.1
8.1

WHY COMPLICATE MUSIC SHARING WHEN USERS SHOULD JOIN IN ONE TAP AND HEAR THE SAME TRACK IN PERFECT SYNC? With 12+ years of experience in mobile app development, real-time systems, and media streaming, I can build a lightweight iOS and Android app focused on seamless synchronized playlist playback. ✔ QR Code & Invite Link Joining ✔ Real-Time Playback Synchronization ✔ Host-Controlled Play/Pause/Skip ✔ Instant Join for Late Participants ✔ Lightweight Backend for Playlist Management ✔ Simple, Clean UI ✔ iOS & Android Support from a Single Codebase My approach: Host Starts Session → Generate QR/Invite Link → Friends Join Instantly → Playback Syncs to Current Track Position → Host Controls Playback for Everyone. Recommended Stack: Flutter + Node.js + WebSockets/WebRTC for low-latency synchronization and scalable real-time communication. The focus will be simplicity, reliable synchronization, and frictionless user onboarding without logins or unnecessary complexity.
$250 CAD in 15 days
8.3
8.3

Hi I can build a simple cross-platform group listening app for iOS and Android where a host starts a playlist session and friends join instantly through a QR code or invite link. I have experience with Flutter or React Native, real-time socket communication, lightweight backend APIs, audio streaming, session state sync, QR invite flows, and TestFlight/internal testing builds. The main technical challenge is keeping late joiners aligned with the host’s current track position without forcing users through accounts or complex setup. My solution would be to use a central playlist source, host-controlled session timing, WebSocket-based playback synchronization, and client-side drift correction so listeners stay closely in sync. I can keep the interface minimal with join, listen, and basic host controls such as play, pause, and skip. The backend can serve playlist files, manage session state, generate invite links, and provide a simple structure for adding or updating tracks later. I would also provide source code, inline comments, and clear setup documentation so the system remains easy to manage. Thanks, Hercules
$500 CAD in 7 days
6.8
6.8

Hi, I will build your real-time shared playlist app — cross-platform iOS and Android builds, a lightweight backend for audio streaming and sync, and the QR/invite-link join flow so listeners connect instantly without any sign-up. For sync, I will use WebSocket-based time-offset correction rather than raw WebRTC — each client pings the server on join, calculates clock drift, and adjusts playback position accordingly. This keeps late joiners aligned within ~100ms without the overhead of peer-to-peer connections. Questions: 1) What format are your audio files — MP3, AAC, or something else — and roughly how many tracks? 2) Should the backend run on your own server, or do you prefer a cloud-hosted solution? Send me a message and we can go over the details. Best regards, Kamran
$285 CAD in 10 days
7.3
7.3

Hello, This is an interesting project, and I can help build the complete iOS and Android solution using Flutter with a lightweight backend for playlist hosting and real-time synchronization. Users will be able to join instantly via QR code or invite link, with no complicated sign-up process, and playback will stay synchronized across devices, including late joiners. I will provide TestFlight/Android testing builds, source code, setup documentation, and an easy way for you to manage and update playlist tracks. I’d be happy to discuss the best architecture for reliable synced playback.
$2,000 CAD in 35 days
6.9
6.9

We have experience developing Flutter-based mobile applications, real-time synchronization systems, audio streaming solutions, QR-based session joining, and lightweight backend architectures. For this project, we would recommend Flutter for both mobile platforms, combined with a lightweight Node.js backend and WebSocket-based synchronization to ensure all participants stay aligned during playback while keeping the overall solution simple and scalable. A few questions: ============= Will the playlist audio files be stored on your server, or do you need us to build a file management/upload interface as well? Approximately how many concurrent listeners should a single session support? Should participants be allowed to reconnect automatically and resume at the current playback position if their connection drops? Do you want audio streamed directly from the server to every device, or should the host device act as the source for playback synchronization? Best Regards, Srashtasoft Team
$500 CAD in 7 days
6.8
6.8

Hi, this is exactly the kind of project where simplicity matters most. We can build a lightweight iOS and Android app that allows one person to start a listening session and invite others instantly through a QR code or shareable link. Users can join with a single tap, without accounts or complicated setup, and begin listening from the same point as everyone else, even when joining late. Rather than relying on Spotify or other third-party services, the app will stream audio from your own source, giving you full control over the playlist and content. We'll focus on reliable synchronization, a clean user experience, and an architecture that's easy to maintain and scale. We'll deliver the mobile apps, backend service, source code, and clear documentation so you can easily manage and update tracks yourself. Our goal is to create a solution that feels effortless for users while remaining dependable behind the scenes. We'd be happy to discuss the details and recommend the most practical approach for achieving smooth, closely synchronized playback across both platforms. Let's have a chat to discuss SOW, cost, timeline, etc Regards, Rohan
$2,500 CAD in 48 days
6.6
6.6

Hi, I can develop this synchronized group-listening app for both iOS and Android. I’ve already built similar real-time streaming and sync-based platforms where multiple users stay aligned to the same media session with minimal latency and effortless onboarding. My approach would be: • Cross-platform mobile app (Flutter or React Native) • Host creates a session and generates a QR code/invite link • Participants join instantly without accounts or passwords • Central playlist/audio server streams tracks to all devices • Real-time sync using WebSockets with periodic timestamp correction • Host-only controls (play, pause, skip) • Late joiners automatically start at the current playback position • TestFlight and Android internal testing builds included • Full source code, setup guide, and playlist management documentation provided The UI will remain clean and minimal, focused entirely on seamless group playback. A couple of quick questions: Will the audio files be stored on your own server/cloud storage, or would you like me to provide a lightweight hosting solution as part of the project? What level of sync accuracy are you expecting (within ~0.5–1 second, or tighter synchronization)? Looking forward to discussing the details. Best regards
$1,200 CAD in 15 days
6.7
6.7

I can build this as a lightweight cross-platform app with real-time synced playback for iOS and Android. Suggested approach: • Flutter or React Native for one shared mobile codebase • Socket/WebSocket sync for playback timing and session control • Simple backend to host playlist/audio files and manage sessions • QR code or invite-link joining with no account setup required Features: • Host-controlled playback (play/pause/skip) • Late join sync at the current playback position • Minimal, clean UI focused on fast joining • TestFlight + Android internal testing builds The architecture can also support future features like volume sync, chat, or private rooms if needed later. Lets connect.. Shailesh
$762 CAD in 16 days
7.2
7.2

Hello, I have 10+ years of experience building real-time mobile applications using React Native, Flutter, Node.js, WebSockets, and media streaming/synchronization systems. My approach would use a central session-based server (Node.js + WebSockets) to maintain playback state (current track, timestamp, play/pause, skip events). The host device acts as the session controller, while participants join via QR code or invite link and instantly sync to the current playback position. For media delivery, we can use a lightweight streaming server or preloaded audio chunks depending on your hosting preference. The mobile apps (iOS and Android) will be built using React Native or Flutter, ensuring a single codebase with minimal UI, fast load times, and smooth playback synchronization. Best Regards
$250 CAD in 7 days
6.9
6.9

Hi, I understand you need a simple iOS/Android app for synchronized group playlist listening, where one host starts playback from your supplied tracks and friends join instantly by QR or invite link at the same playback point. I have experience building real-time mobile apps with Flutter/React Native, lightweight media backends, socket-based session sync, QR invite flows, audio streaming, and minimal user-friendly interfaces. I would create a lean app with host controls, listener playback sync, late-join timestamp alignment, backend playlist serving, clear track-update documentation, TestFlight/internal builds, and source code handoff. Q1: Do you prefer Flutter or React Native? Q2: Will the playlist files be hosted on your server, cloud storage, or bundled locally? Q3: How close does sync need to be—roughly within 1–2 seconds or near real-time? Best regards.
$500 CAD in 7 days
6.6
6.6

Hi, I can build a simple cross-platform mobile app that lets one host start a playlist session and allows friends on iOS or Android to join instantly through a QR code or invite link, with playback synced to the host’s current position. For this project, I would recommend Flutter with a lightweight Node.js or Firebase backend. Flutter allows one shared codebase for iOS and Android, while the backend can manage sessions, playlist metadata, audio file URLs, current track, playback position, and host controls. For synchronization, I would use WebSockets or a similar real-time channel so late joiners can calculate the current track position and start playback at the correct point. The interface can stay minimal: host controls for start, pause, and skip, plus a listener view that simply joins and plays. No logins are needed for the first version. The backend can serve playlist files or connect to the central source you provide, and I will document how you can add or update tracks later. The final delivery will include iOS and Android test builds, backend setup, source code, inline comments, and clear setup documentation. Best, Justin
$500 CAD in 7 days
6.2
6.2

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 , java spring boot and php CodeIgniter mvc and Laravel. Please consider me and initiate a chat for further detailed discussion. Regards, Anju
$400 CAD in 7 days
6.5
6.5

I’ve built real-time sync features before, so this flow is very familiar. You want a lightweight “tap and join” shared listening experience with tight playback sync and zero friction. The clean way to handle this is: a single host-controlled playback timeline, with all clients syncing to a shared clock (via WebSockets) and buffering just enough to avoid drift. No heavy integrations needed. I’d keep it simple: - Cross-platform app (Flutter or React Native) for fast delivery - Minimal UI: join → auto-sync → listen - QR/invite link that drops users straight into the active session - Backend that serves audio + maintains session state and timestamps One thing to handle carefully: small network delays can desync playback over time, so I’ll include periodic re-sync checkpoints to keep everyone aligned without audible jumps. You’ll get clean builds, documented setup for adding tracks, and readable code. Quick question: will all audio files be hosted on your server, or should the app support loading them dynamically from a URL source?
$562.50 CAD in 5 days
6.6
6.6

Hi There!!! ★★★★ ( Real-time synced shared playlist mobile app with ultra-simple join flow and minimal UI for group listening experience ) ★★★★ I’ve carefully reviewed your project and understand you need a simple mobile app where one host streams a playlist and multiple users join instantly via QR/link without login, all staying perfectly synced in real time across iOS and Android. ⚜ Cross-platform mobile app (Flutter / React Native) ⚜ Real-time audio sync using WebSocket/WebRTC approach ⚜ QR code / invite link based instant session joining ⚜ Lightweight backend for playlist hosting & streaming ⚜ Host controls (play, pause, skip) with synced listeners ⚜ Minimal UI design focused on simplicity ⚜ TestFlight + Android build delivery with documentation I have experience building real-time mobile apps, streaming-based systems, and socket-driven synchronization features where low latency and smooth user experience are critical. I enjoy working on clean, minimal apps where performance matters more than complexity. My approach will be to design a lightweight architecture using WebSockets for sync events, a central playlist server for audio delivery, and session-based state management so all users stay aligned in playback position. I’ll ensure instant joining via QR/link with no authentication friction. I’d be happy to discuss the best technical approach and keep this app as simple and reliable as you envision. Warm Regards, Farhin B.
$256 CAD in 10 days
6.6
6.6

Hello, Having pioneered front-end and back-end mobile app development for several prestigious companies, my team at Our Software is primed to deliver your ideal real-time shared playlist mobile app. We understand your need for a lightweight backend or local server component for seamless group playback and on-time entry, and we’re ready to make it happen using WebRTC, socket-based syncing, or any other approach you prefer. In addition, we prioritize getting the basics right without overwhelming users with cumbersome login or setup processes. With our design ethos aligned to your project, we'll ensure that late joiners can effortlessly tune in by just tapping a link or scanning a QR code. Our proposed 'minimal interface with basic play/pause controls' will ensure that only the host has extended control, a design feature aimed at guaranteeing optimum user experience. Finally, we believe in empowering clients. With this in mind, not only will we provide adaptable iOS and Android builds and a clear setup documentation per your project expectations but also offer an opportunity for easy track addition or updates within the app itself. Choose us,and let’s turn your vision into an efficient reality together! Thanks!
$350 CAD in 4 days
6.1
6.1

Hi there, We’ve developed similar apps that sync audio across multiple devices, allowing users to join sessions without complex logins. For your project, we can use a lightweight backend to serve audio files and manage user sessions, while also implementing a WebRTC-based solution for real-time audio syncing. We’ve built several apps with WebRTC, including a live audio streaming platform where hosts can create events and invite listeners. We also developed a dedicated listener app that allows users to join events and listen to live audio. Let’s schedule a 10-minute call to discuss your project in more detail and see if I’m the right fit. I usually respond within 10 minutes. Best regards, Adil
$527.34 CAD in 7 days
5.9
5.9

Hi there, I can build your real time shared playlist app for iOS and Android with a simple tap to join experience and closely synced playback. I have strong experience with mobile app development, audio streaming, socket based real time sync, lightweight backends, QR invite flows, and clean cross platform delivery. For this MVP, I would use Flutter or React Native for both apps, a small Node.js backend to serve playlist files, and WebSocket based session syncing so late joiners receive the current track and exact playback position when they enter. The host can start, pause, and skip tracks, while guests simply listen with minimal setup. Deliverables will include iOS and Android builds for testing, backend or local server component, source code with inline comments, and clear documentation for adding or updating tracks. My focus will be simple architecture, smooth joining, reliable sync, and an interface that stays easy for every user. Kind regards,
$500 CAD in 7 days
5.7
5.7

Hello! As per your project post, you’re looking to build a real-time shared playlist mobile application that allows multiple users on iOS and Android to listen to the same audio stream in perfect synchronization. The goal is to create a frictionless group listening experience where users can instantly join via QR code or invite link and immediately begin playback at the exact position the host is currently hearing. My focus will be on delivering a streamlined cross-platform application featuring: host-controlled listening sessions, real-time synchronized audio playback, QR code and invite-link based joining, instant session access without mandatory account creation, late-join synchronization, centralized playlist streaming, track skip controls for hosts, participant management, session state synchronization, and responsive mobile interfaces for both iOS and Android. I specialize in Flutter, React Native, real-time applications, WebSockets, audio streaming systems, Firebase, Node.js, and scalable backend development. My focus will be on building a lightweight, highly responsive MVP that delivers accurate playback synchronization while keeping the user experience as simple as possible. Let’s connect to review the playlist source, expected listener volume, and synchronization requirements so we can define the most efficient architecture for a smooth real-time listening experience. Best regards, Nikita Gupta.
$300 CAD in 22 days
5.3
5.3

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