Network Simulator - Lag Test

REALSIGNAL PTE. LTD.

Contains adsIn-app purchases

About this app

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.

Ratings and reviews

stupid cant do other options and useless for anything not paying for all of that and basically getting deleted and cant create my own because premium and using robotic text pathetic and watching the ads does nothing and does not work loading any features

can't do anything without buying. very misleading, nothing is really free

Dear Netsim Pro, the previous one was good, whenever you update the app, it does not work, you should do it as before, now if you update it, it does not work, so my request is that you should do it as before.

What’s new

Fixed known issues and improved overall performance and user experience.