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Floating Volume icon

Floating Volume

A floating volume slider you can reach from any app — adjust the volume without leaving what you're doing.

Get it on F-Droid APK on GitHub Source

F-Droid version

Floating Volume screenshot 1 Floating Volume screenshot 2 Floating Volume screenshot 3 Floating Volume screenshot 4 Floating Volume screenshot 5 Floating Volume screenshot 6

Overview

The hardware volume keys are clumsy and the system panel gets in the way. Floating Volume puts a clean slider on top of everything, so a single drag sets the exact level you want — during a video, a call, a game, anything.

What I built

Sole developer and maintainer. A Flutter app with a native Android overlay: the Dart side owns the UI and state, and a Kotlin service renders the system-overlay slider and streams volume events back. The Dart↔Kotlin boundary is fully type-safe, generated with Pigeon instead of stringly-typed method channels. State is modelled with the BLoC pattern and immutable freezed unions.

Recent work: an adjustable slider-size setting with live overlay updates, density-independent sizing so the control looks right on every screen, and a refreshed Material 3 home and permissions flow. Builds are reproducible — a build.py + Docker pipeline with a pinned Flutter version (FVM) that F-Droid verifies against source.

Built with

Languages

Dart Kotlin Python

Framework

Flutter 3.29 Android SDK System-overlay window

Architecture & libraries

BLoC / flutter_bloc freezed Pigeon (platform channels) permission_handler volume_controller device_info_plus shared_preferences flutter_svg

Build & delivery

FVM Docker build_runner / codegen GitHub Actions Fastlane metadata F-Droid reproducible builds

Features

Always-accessible slider

Floats over every app; drag to set the volume instantly.

Adjustable slider size

Size setting with live overlay updates as you change it.

Density-independent sizing

Looks right on every screen, from compact phones to tablets.

Modern Material 3 UI

Refreshed home and permission screens.

Built with Flutter

Smooth, consistent, and open for contributions.

Reproducible builds

Verified by F-Droid from source.

Free & open source

Floating Volume is licensed under the GPL-3.0. No ads, no tracking, no account. Issues and contributions are welcome on GitHub.

Android GPL-3.0 Package: com.github.mkalmousli.floating_volume By Mohamad Almousli