Network Simulator - Lag Test

Simulate real-world network conditions directly on your Android device.

Perform on-device network simulation on real Android phones — no emulator, no PC, no external proxies.
Test lag, packet loss, and bandwidth limits without root or system modification.

Network Simulator is a professional network testing tool for developers and QA engineers, designed for real-device testing under poor or unstable networks.

🚀 Key Features

🌐 Network Condition Simulation
• Simulate latency, jitter, packet loss, and bandwidth limits
• Reproduce 2G, 3G, 4G, slow Wi-Fi, and custom weak network scenarios
• Works with TCP, UDP, and ICMP (Ping)

📡 Packet Capture (PCAP)
• Capture live network traffic during weak network testing
• Export standard PCAP files
• Analyze traffic in Wireshark and other tools
• Inspect packet drops, latency, and protocol behavior

📊 Network Test Reports
• Automatically generate network testing reports during simulation
• View statistics on-device in CSV or interactive HTML format
• Visualize upload/download latency and packet loss trends
• Export reports for sharing, debugging, or documentation

🎯 Per-Domain Network Rules
• Apply network conditions to specific domains or APIs
• Whitelist or blacklist mode (mutually exclusive)
• Simulate partial failures while keeping other services unaffected

🧑‍💻 Built for Developers & Testers
• Floating control panel for real-time adjustments
• One-tap presets for common weak network scenarios
• Test real-device behavior beyond Android Emulator limitations
• An Android alternative to iOS Network Link Conditioner

🔒 Privacy & Security
• No root required
• Built on Android VpnService for local traffic routing
• All processing is done locally
• No data is collected or uploaded

Network Simulator helps you simulate poor networks, capture traffic, and analyze results — all on a real Android device.