DropLine Server – Wi-Fi FTP & HTTP File Server (Flutter Android App)

DropLine Server turns any Android phone into a fast, local Wi-Fi file server. Share files between your phone, laptop and other devices using a browser (HTTP) or an FTP client, with no USB cables and no external cloud services.

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Key Features

Wi-Fi FTP server – Full FTP server running directly on the device so you can browse, upload and download files from tools like FileZilla, WinSCP and other FTP clients.
HTTP file server – Simple web UI that lets you manage files from any modern browser on the same network (Chrome, Edge, Firefox, Safari, etc.).
Configurable ports and credentials – Change FTP and HTTP ports, username and password, enable or disable anonymous access and read-only mode from the Settings screen.
Foreground service – Reliable background operation using an Android foreground service with a persistent notification while the server is running.
Connected clients and transfer stats – See currently connected clients and basic transfer statistics (upload and download totals for FTP and HTTP).
Onboarding and in-app tutorial – Built-in guidance that shows users how to connect from Windows, macOS and other devices on the same Wi-Fi network.
Local-only and privacy-friendly – All traffic stays inside the local network; there is no external backend, account system or cloud dependency.

Use Cases

Quickly move photos, videos and documents between phone and laptop over Wi-Fi.
Turn an old Android phone into a simple, always-on local file server.
Provide local file access in small offices, labs or classrooms without setting up a full NAS.
Bundle as a utility app in your own branded product for your clients.

Technical Stack

Framework: Flutter 3.5.4+ (null-safe, sound Dart)
State management and routing: GetX
Local storage: GetStorage for persisting ports, credentials and flags
Platforms: Android (min SDK 21, target modern Android versions)

Permissions

The app requests only the permissions needed to run an FTP/HTTP server and access device storage:

Network: INTERNET, ACCESS_NETWORK_STATE, ACCESS_WIFI_STATE, CHANGE_WIFI_MULTICAST_STATE
Storage (depending on Android version): READ_EXTERNAL_STORAGE, WRITE_EXTERNAL_STORAGE, READ_MEDIA_IMAGES, READ_MEDIA_VIDEO, READ_MEDIA_AUDIO, MANAGE_EXTERNAL_STORAGE
Foreground service and notifications: FOREGROUND_SERVICE, FOREGROUND_SERVICE_DATA_SYNC, POST_NOTIFICATIONS

If you or your buyers plan to publish this app on Google Play, you must declare a valid file-manager or file-sharing use case for storage access and provide a clear privacy policy.

Customization

Change app name and branding (title, launcher label and package ID).
Replace icons and splash screen with your own assets.
Adjust default ports, default username/password and behaviour flags in a single configuration file.
Add or remove settings options according to your use case.

What You Get

Complete Flutter project for Android with clean, organized code.
Native Android integration for the FTP and HTTP server logic.
In-app onboarding screens and tutorial page.
Full documentation in HTML format explaining setup, configuration, permissions and build steps.

Requirements

Flutter SDK 3.5.4 or higher (stable)
Android Studio or VS Code (recommended)
JDK 17 and Android SDK

Support

Support is provided via CodeCanyon according to the official Envato Item Support Policy. Please include your purchase code, Flutter version, device/Android version and clear steps to reproduce any issue.

Local WiFi File Transfer FTP HTTP Server App Android