Continuous RTT持续 RTT 诊断
Measure TCP round-trip latency every 100 ms and track current, average and P95 values in real time.每 100 ms 测量一次 TCP 往返时延，实时查看当前、平均和 P95 RTT。
Continuous Wi-Fi diagnostics持续 Wi-Fi 诊断
See every delay.
Understand every roam.
看见每一次时延，
读懂每一次漫游。
WiFi Diag continuously measures TCP round-trip latency, connection stability and Wi-Fi AP roaming—putting packet loss, disconnections and network changes on one clear timeline. WiFi Diag 持续测量 TCP 往返时延、连接稳定性和 Wi-Fi AP 漫游，将丢包、断连与网络切换呈现在同一条清晰的时间线上。
For iPhone and iPad · No ads · No subscription适用于 iPhone 与 iPad · 无广告 · 无订阅
Live RTT实时 RTT (ms)
Network:网络： Home Mesh
Current当前18.6
Average平均20.3
50
Last 60 s最近 60 秒
Key Metrics核心指标
Disconnections断连次数0
Packet loss丢包率0.18%
Roaming漫游次数3
P95 RTT31.8 ms
100 msProbe interval探测周期
60 sLive window实时窗口
CSV / JSONData export数据导出
On device仅限本机Diagnostic history诊断历史
More than a speed test不止是一次测速
Diagnose the moments that ordinary tests miss.捕捉普通测速看不到的网络瞬间。
A single speed number cannot explain a video-call freeze, an unstable Mesh handoff or a connection that drops for one second. WiFi Diag records what happened and when.单一网速数字无法解释视频通话为何卡顿、Mesh 切换为何不稳定，或连接为何短暂中断。WiFi Diag 会持续记录发生了什么，以及发生的时间。
Loss and disconnections丢包与真实断连
Distinguish individual echo timeouts from sustained connection interruptions, with recovery time and duration.区分单次回显超时与持续连接中断，并记录恢复时间和断连时长。
AP roaming timelineAP 漫游时间线
Detect BSSID changes under the same SSID and correlate each Mesh or AC+AP handoff with latency.检测同一 SSID 下的 BSSID 变化，将每次 Mesh 或 AC+AP 切换与时延关联起来。
Interactive charts交互式图表
Tap for exact samples, drag through history and zoom from a few seconds to a longer diagnostic window.轻点查看具体样本，拖动浏览前后记录，并缩放时间轴观察不同时间范围。
Local history and export本地历史与导出
Review complete sessions, roaming and disconnection records, then export CSV or JSON only when you choose.查看完整诊断、漫游与断连记录，并在您主动选择时导出 CSV 或 JSON。
Your server, your path按目标选择服务器
Use a public endpoint for end-to-end latency or deploy the open-source Echo Server on your LAN to isolate Wi-Fi quality.使用公网端点观察端到端时延，或在局域网部署开源 Echo Server，专注分析 Wi-Fi 质量。
One shared timeline一条完整时间线
From a symptom to a useful answer.从一次卡顿，找到有用的答案。
WiFi Diag combines echo results, network-path changes and Wi-Fi access-point transitions. You can see whether a problem came from latency, a connection interruption or an AP handoff.WiFi Diag 将回显结果、网络路径变化与 Wi-Fi 接入点切换放在一起，帮助判断问题来自时延、连接中断，还是 AP 漫游。
15:42:08.0
Stable connection · 18.6 ms RTT连接稳定 · RTT 18.6 ms
Home Mesh · Access point 4A:65:70Home Mesh · 接入点 4A:65:70
15:42:13.4
AP roaming detected检测到 AP 漫游
BSSID changed from 4A:65:70 to 8C:31:B2BSSID 从 4A:65:70 切换为 8C:31:B2
15:42:13.7
Connection recovered · 31.8 ms P95连接恢复 · P95 RTT 31.8 ms
The timeline keeps the transition and latency together.漫游切换与时延变化保存在同一条时间线上。
Privacy by design从设计开始保护隐私
Your network history stays yours.您的网络历史，始终由您掌控。
WiFi Diag does not read your geographic coordinates. iOS location permission is used only to access the current Wi-Fi SSID and BSSID. Diagnostic history remains on your device unless you intentionally export it.WiFi Diag 不会读取您的经纬度。定位权限仅因 iOS 要求而用于访问当前 Wi-Fi 的 SSID 和 BSSID。除非您主动导出，诊断历史只保存在本机。
No geographic coordinates collected不读取或保存地理坐标
No advertising or analytics SDKs无广告和第三方分析 SDK
SSID/BSSID never sent in echo probes探测包不包含 SSID/BSSID
You decide when data is exported只有您能主动导出数据
$ ./wifidiag-echo -addr :8080
WebSocket endpoint: ws://0.0.0.0:8080
Health endpoint: /healthz
✓ Ready for WiFi Diag probes
$ curl http://192.168.1.8:8080/healthz
{"status":"ok"}
Open-source Echo Server开源 Echo Server
Measure Wi-Fi close to home.在离网络最近的地方测量。
Deploy the lightweight Go Echo Server on macOS, Linux or Windows. A LAN endpoint reduces internet-path noise, helping you focus on access points, Mesh roaming and the local network.将轻量级 Go Echo Server 部署到 macOS、Linux 或 Windows。局域网端点可减少公网路径干扰，更专注地分析 AP、Mesh 漫游和本地网络。
Turn “the Wi-Fi feels slow” into evidence.让“Wi-Fi 好像很慢”变成清晰证据。
Diagnose home Wi-Fi, Mesh networks and enterprise AC+AP deployments with a continuous view of latency, stability and roaming.持续观察时延、稳定性与漫游，诊断家庭 Wi-Fi、Mesh 网络和企业 AC+AP 部署。