
Show HN: AirplaneMode – Simulate realistic airplane WiFi on macOSI needed to test how my app performed on airplane WiFi and found that existing tools (Network Link Conditioner, comcast, Chrome DevTools, etc) weren't sufficient.AirplaneMode is a macOS CLI and menu bar app that uses a local MASQUE relay to provide:1. Jitter. All of the mac os network simulators I tried apply a fixed constant delay with no jitter model. Real airplane satellite WiFi follows a log-normal distribution — most packets arrive near base RTT, but a few percent spike to 5-10x. AirplaneMode samples jitter from a log-normal distribution fit to real flight measurements.2. Userspace, with domain scoping and UDP support. No root required. A .mobileconfig profile routes only matched domains through the relay — the rest of your network is unaffected. The relay operates at the UDP packet level via MASQUE, so HTTP/3 and QUIC congestion control respond naturally to simulated conditions.3. Realistic Profiles. Airlines use performance-enhancing proxies that inflate speed test results. Pres
