About
Why is my Wi-Fi slow? NetDoctor finds out.
One tap runs a full check-up of your home network and tells you, in plain language, whether the problem is your Wi-Fi, your router, your internet provider or DNS — and what to do next.
DIAGNOSIS, NOT JUST NUMBERS • A health score with the evidence behind it • Clear answers like "Your Wi-Fi is fine. Your DNS is slow." • Confidence level and step-by-step fixes
WHAT NETDOCTOR CHECKS • Phone → router latency, jitter and packet loss • Internet latency and stability • DNS speed compared with Cloudflare, Google and Quad9 • Download and upload speed • Sign-in pages, VPN, IPv6 and Low Data Mode
WI-FI OR PROVIDER? WE CAN TELL Run the same test on Wi-Fi and on cellular to see where the problem really is.
FIND WEAK SPOTS AT HOME Wi-Fi Health Map: test each room and see which ones need help — based on real performance, not just signal bars.
SEE EVERY DEVICE ON YOUR NETWORK Router, Apple TV, printers, speakers, smart home and more. New devices are highlighted — without scary "you've been hacked" alarms.
LAG UNDER LOAD The bufferbloat test explains "500 Mbps, but my game still lags."
HISTORY See when your network got worse: "Health dropped from 94 to 61."
PRIVATE BY DESIGN No account. No cloud. No ads. No tracking. Your diagnostics stay on your iPhone.
NETDOCTOR PRO — PAY ONCE Wi-Fi Health Map, lag-under-load test, DNS Compare, unlimited history and trends, device naming and shareable reports. One-time purchase, no subscription. Try each Pro test once for free.
Speed tests use Cloudflare's public speed servers and use mobile data when you're on cellular.
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