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.