Network Simulator - Lag Test

Simulate real-world network conditions and repeatable multi-stage tests directly on your Android device.

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

Network Simulator is a professional network testing tool for developers and QA engineers. Reproduce poor or unstable network conditions on real devices, then keep a clear record of every test run.

🚀 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)

🧭 Multi-Scenario Timeline Testing

• Arrange network stages into a reusable, step-by-step timeline
• Combine bandwidth, latency, jitter, packet loss, and network transitions
• Start once to automatically switch weak-network conditions, repeat the sequence, and record the run — closer to a real mobile network journey

🔁 Repeatable Runs & Structured Records

• Run a scenario in loops from 1 to 99 times, with estimated total duration visible in real time
• Keep the scenario version, step snapshots, and run results
• Make regression testing, issue reproduction, and team collaboration easier to trace

📡 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

🔒 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, run repeatable multi-scenario tests, capture traffic, and analyze results — all on a real Android device.

Recent changes:
Fixed known issues and improved overall performance and user experience.