Resona is a native Android music player built with Kotlin that lets users listen to music from their own music servers, without ads or unnecessary tracking.

The goal was to build a smooth, modern music experience where users can access their music library, stream songs, and enjoy their favorite tracks from anywhere. Instead of depending on a subscription-based music platform, Resona gives users more control over their own music.

I wanted to build a music player that combines a clean, modern interface with the freedom to use personal music servers. Many users already have their own music collections, but accessing them through a convenient mobile app can be challenging.

Resona aims to make that experience simple by connecting to services like Navidrome and Jellyfin, allowing users to access their personal music libraries both locally and remotely.

Connect to your own music server and browse your music collection from your Android device.

Stream your favorite songs from supported servers, whether you're connected to your local network or accessing your server remotely.

Enjoy downloaded music without needing an active internet connection.

A clean interface designed to make browsing music, exploring your library, and controlling playback simple and intuitive.

Resona is designed around a straightforward principle: your music experience should be yours, without ads or unnecessary tracking.

Built with Kotlin for Android, Resona focuses on a lightweight app size, responsive interactions, and a smooth user experience.

Resona has been tested with:

Navidrome — Connect to your personal music streaming server.

Jellyfin — Access music from your self-hosted media library.

Both local-network and remote server connections have been tested.

Kotlin — Native Android development

Android — Platform and application development

Media3 / ExoPlayer — Audio playback

Jetpack Compose — Modern Android UI

Coroutines and Flow — Asynchronous operations and reactive data handling

Room — Local data storage

I developed Resona as a native Android application rather than using a cross-platform framework. This gave me direct control over Android features and allowed me to focus on performance, application size, and the overall user experience.

One of the key goals was keeping the app lightweight. The app bundle is approximately 10 MB, with an installed size of around 4 MB when delivered through Google Play.

I also worked on integrating different music server systems so users can access their existing music collections instead of being locked into a single music provider.

I handled the project from development through release preparation, including:

Planning the application structure

Building the native Android app

Integrating music server APIs

Implementing audio playback and music library access

Designing the user experience

Testing local and remote server connections

Preparing the app for Google Play release

Resona is designed to be a free music player that gives users more control over how they access and enjoy their music. The long-term vision is to keep improving the experience while maintaining its focus on privacy, performance, and personal music ownership.

Project: Resona

Category: Android App / Music Player

Platform: Android

Development: Solo project

Tech stack: Kotlin, Jetpack Compose, Android Media3