redcloud_android

🛡️ RedCloud VPN is an open-source Android VPN client that combines multiple networking engines in a single application. Built with Flutter and native Android components, it provides access to V2Ray, Aether/MASQUE, and Tor through a unified interface.

The application is designed for users who want flexible connection options, automatic endpoint discovery, DNS tools, subscription management, and modern Android VPN features in one place.

🚀 Main Features

• Multi-core architecture — combines V2Ray, Aether/MASQUE, and Tor-based networking options.

• V2Ray support — connect using VLESS-based configurations and manage multiple profiles directly from the application.

• Aether / MASQUE — provides an Aether-based connection engine using MASQUE over HTTP/2 and HTTP/3, with configurable transport behavior.

• Tor integration — includes Tor connectivity with support for Snowflake and custom bridges.

• Cloudflare endpoint scanner — includes a Layer 7 scanner that tests candidate endpoints using TCP, TLS, SNI, and WebSocket upgrade requests instead of relying only on basic ping results.

• DNS tools — provides DNS testing and recovery features designed to help identify usable DNS resolvers when the default resolver is unavailable.

• Smart account management — manage multiple VLESS accounts and automatically move to another available account when the current account reaches its configured usage limit.

• Traffic usage tracking — monitor daily usage for supported VLESS accounts and keep track of available profiles.

• Android VPN mode — route device traffic through the selected connection using Android's VPN service.

🌐 Connection Options

RedCloud provides several networking modes from the same application:

V2Ray — use supported VLESS configurations and profiles.

Aether/MASQUE — connect through MASQUE over HTTP/2 or HTTP/3, with support for configurable TLS fragmentation and related connection options.

Tor — use Tor circuits with Snowflake or custom bridges when supported.

This multi-engine approach lets users choose a connection method based on their configuration and network environment.

🔎 Endpoint Testing

The built-in endpoint scanner performs application-layer checks instead of simply measuring ICMP latency.

It can establish a TCP connection, perform a TLS handshake with a selected SNI, and send a WebSocket upgrade request to verify the endpoint's response.

A larger fallback IP database can also be used when the initial candidates do not produce suitable results.

🧅 Tor & Snowflake

RedCloud integrates Tor as one of its available connection methods.

Supported options include:

• Tor over the application's MASQUE-based connection • Snowflake bridges • Custom Tor bridges • Connection bootstrap progress

This provides an additional networking option without requiring a separate Tor application.

🎨 Modern Interface

RedCloud uses Material Design 3 with both light and dark themes.

The interface supports:

English 🇬🇧 and Persian 🇮🇷

Users can switch between supported languages directly within the application.

🔐 Open Source

RedCloud VPN is an open-source project released under the Apache-2.0 license.

The source code is publicly available on GitHub, including the Android application, native components, tests, and build configuration.

📱 Android

RedCloud is designed specifically for Android and provides Universal, ARM64, and ARMv7 APK builds.

The application uses Android's VPN service for system-wide traffic routing and does not require root access for its standard VPN functionality.