RadioLine | Online Radio App With Studio Equalizer and Stream Recording

⚠️ IMPORTANT PLATFORM NOTICE: NATIVE ANDROID ONLY (NO iOS VERSION)

Please note that RadioLine is exclusively a 100% Native Android application written in Kotlin for Android Studio. This purchase DOES NOT include an iOS version, Xcode project, Swift/Objective-C code, or cross-platform codebase (such as Flutter or React Native). Please verify your platform requirements before purchasing.

RadioLine – Native Android Online Radio App With Studio Equalizer and Live Stream Recording

RadioLine is a commercial-grade, high-performance native Android radio streaming application built with Google Jetpack Media3 (ExoPlayer), modern Material 3 design, and 100% Kotlin source code.

Engineered for app publishers and commercial broadcasters, RadioLine features a built-in 5-Band Hardware-Accelerated Studio Equalizer, Live Audio Stream Recording to MP3, instant access to over 45,000+ radio stations worldwide, an Offline-First Architecture, an Instant Local JSON Configuration Architecture, and a robust Dual Monetization Engine (Google AdMob + Play Billing v8 In-App Purchases).

⚠️ Important Notice: External Third-Party Services & Developer Costs Disclaimer

To ensure complete transparency prior to purchase, please be advised that the following external third-party services and developer accounts carry independent fees and policies that are not included in the purchase price of this item:

• Google Play Developer Account: Publishing and distributing apps on Google Play requires an active Google Play Developer account, which carries a one-time registration fee ($25 USD) paid directly to Google. Standard Google Play transaction and service fees apply to In-App Purchases.
• Google AdMob Account & Ad Unit IDs: The app is pre-configured with Google’s official sample/test ad units for immediate zero-config testing. To earn revenue from real users, buyers must have an active Google AdMob publisher account and replace the test IDs with their own AdMob App ID and Ad Unit IDs (Banner, Interstitial, Native Advanced, App Open) inside radio_config.json. All ad revenue is collected directly in the buyer’s own Google AdMob account.
• 100% Serverless & Zero Server Hosting Costs: RadioLine is an offline-first, native Android mobile application with zero mandatory server hosting costs. Live radio feeds are served directly by the free, public community Radio-Browser API, and all configurations are bundled locally inside the app with zero external server dependencies.
• Zero Author Phone-Home & Server Independence: This application ships with zero author phone-home mechanisms, zero remote DRM locks, and no external dependencies controlled by the author. You receive 100% full, uncompiled Kotlin source code that you can freely read, modify, and rebrand.

Demo & Testing Instructions

You can evaluate and test all application features immediately without any friction:

• No User Login Required: RadioLine is an instant radio streaming player that does NOT require user login or account registration. Users can launch the app and listen to stations immediately.
• Immediate Out-of-the-Box Playback: The app is pre-configured with Google official test ad units and active worldwide live radio streams. You can test live stream playback, background audio service, 5-band studio equalizer, and MP3 stream recording immediately without any initial setup.
• Developer Debug VIP Testing: During local development in Android Studio (BuildConfig.DEBUG), you can tap the VIP Ad-Free Card 5 times in the Settings screen to instantly toggle the VIP status ON/OFF for sandbox UI testing. (Note: This developer shortcut is strictly compiled out/disabled in production release builds to protect your monetization.)
• Google Play Billing Sandbox: Add your tester Gmail to your Google Play Console under Settings > License Testing to test in-app purchases with Google sandbox test cards without actual charges.

Key Features at a Glance

• 100% Kotlin Full Source Code: Clean, modular, and uncompiled Kotlin code. Fully modifiable by the buyer with zero closed binaries, zero DRM, zero phone-home mechanisms, and zero code access restrictions.
• Google Jetpack Media3 ExoPlayer: Rock-solid, buffer-free playback with seamless background audio service and lock-screen controls.
• 5-Band Studio Audio Equalizer: Real-time frequency control (60Hz, 230Hz, 910Hz, 3.6kHz, 14kHz), Dynamic Bass Boost, and 3D Spatial Virtualizer with 10 presets.
• Live Stream Audio Recorder: Capture ongoing live radio broadcasts directly to high-quality local MP3 files with a live VU duration indicator.
• Integrated Offline Recordings Library: Playback, manage, and share recorded broadcasts without an internet connection.
• 45,000+ Stations Worldwide: Instant search, country filter (180+ countries), genre categories, and top trending station lists.
• Buyer-Controlled AdMob Monetization: Ships with Google official test ad unit IDs by default. Replace them with your own AdMob IDs in radio_config.json in seconds (Adaptive Banner, Interstitial, Native Advanced, and App Open Ads).
• Google Play Billing v8 (In-App Purchases): Ready for VIP Ad-Free lifetime or subscription unlocks (compliant with the latest Google Play 2026/2027 requirements).
• Live ICY Metadata & Waveform Visualizer: Displays real-time song title, artist name, and animated audio pulse.
• Smart Sleep Timer: Set 15, 30, 60, or 90 minute timers with gentle audio fade-out.
• Buyer-Controlled Google Firebase Remote Config: Full OTA Remote Config capability via your own Google Firebase Console. Change banners, ad frequency, or station lists over-the-air with zero app updates needed on Google Play, managed 100% inside your own Google account.
• Instant Local Configuration Studio: App works offline out-of-the-box with bundled JSON. Easily update stations, toggle ad units, and customize app settings in seconds using the bundled visual configuration tool or local JSON.

Customization & Reskin Services

Need custom feature development, complete app reskinning, or store launch assistance? Our team is available for custom work and freelance projects. Get in touch with us directly at: ngulonstudio@gmail.com

Supported Audio Formats and Protocols

• MP3, AAC, AAC+, OGG, WAV
• HLS (HTTP Live Streaming – m3u8)
• PLS and M3U playlist feeds
• Shoutcast and Icecast metadata streams

️ Technical Specifications

• IDE: Android Studio Ladybug / Koala / Hedgehog (or newer)
• Language: 100% Kotlin with Coroutines and StateFlow
• Player Framework: Google Jetpack Media3 ExoPlayer 1.4.1
• Database: Android Jetpack Room with SQLite caching
• Networking: Retrofit 2 + OkHttp 4
• Architecture: MVVM (Model-View-ViewModel) + Clean Architecture
• Minimum SDK: Android 7.0 (API 24 – covering 97%+ of active devices)

What You Receive in the Download Package

• Complete Android Studio project with 100% Kotlin source code (fully modifiable)
• Visual configuration generator (HTML tool)
• Comprehensive Step-by-Step Documentation (HTML) with detailed screenshots
• Third-party dependency license manifest (Google Jetpack Media3 Apache 2.0, OkHttp, etc.)
• App logo templates and promotional asset files
• Free lifetime updates and developer email support

Artificial Intelligence (AI) Tools & Author Disclosure

In full transparency with Envato Market guidelines and buyers:

• Human-Engineered Core Architecture: The application architecture, audio playback service lifecycle, hardware equalizer processing, offline database persistence, and native Material 3 UI design were designed, engineered, curated, and rigorously tested by the human author (NgulonStudio).
• AI Assistance: Generative AI coding assistants (LLMs) were utilized as productivity tools for boilerplate code scaffolding, documentation formatting, and internationalization/translation string support.
• Integrity & Code Quality: All generated code blocks and configurations have been manually verified, debugged, and tested on physical Android devices to ensure strict standard compliance, reliability, and security.