NetDiag+ Network Toolkit vs WiFi Coverage Survey & Heatmap

Your game lags but the speed test says 300 Mbps. Your call breaks up while a download runs fine. Your VPN connects on one network and refuses on another. NetDiag+ shows where the problem is: your Wi-Fi, your router or your provider. 31 network tools on your iPhone, running on raw BSD sockets — no jailbreak, no desktop. START HERE • Health Score — one run of about 40 seconds gives a score from 0 to 100 and a verdict for your Wi-Fi, your router and your provider. One reminder can bring you back at the other end of the day, and a home-screen widget shows your last score. • Report for your provider — two or more Health Score checks in one text or PDF document (in English): day or evening, which link was flagged each time, and the numbers from every check. Something concrete to send instead of "my internet is slow". • Latency Dashboard — game regions and CDN edges, plus local carriers for the Gulf, Turkey, Russia and Egypt, sorted worst-first with median, jitter and loss. Your router is checked first, so a problem at home is not mistaken for a slow server. • Bufferbloat — loads your line while pinging your router and the internet, grades the result from A+ to F and shows where the queue builds up: at home or at your provider. If the test server is throttled, it says so instead of guessing a grade. DIAGNOSE • Ping & Traceroute — classic reach tests, with your own interval and packet size • MTR — continuous traceroute with per-hop loss and RTT, probed in parallel • Path MTU Discovery — finds the right MTU for your VPN or tunnel: the largest packet that really gets through, in about 30 seconds • Speed Test — download and upload bandwidth • Site Reach — TCP and TLS audit of 35 popular sites, detects SNI blocks • HTTP/3 Tester — a real QUIC handshake, not a header • Host Monitor — alerts when a server goes down DNS, DOMAINS & SECURITY • NSLookup — any DNS record type • Encrypted DNS — DoH and DoT across Cloudflare, Google, Quad9 and NextDNS, compared • Whois — registration data with parsed fields • SSL Checker — certificate chain and expiry dates • TLS Inspector — which TLS versions and ciphers a server accepts • BGP Info — AS, peers and announced prefixes for any IP • Reverse DNS — the name behind an IP address • HTTP Headers — every response header and the whole redirect chain LOCAL NETWORK • Wi-Fi Info — SSID, signal strength, IP details • LAN Scanner — every device answering on your subnet, with Wake-on-LAN • Bonjour Browser — AirPlay receivers, printers, Chromecasts, HomeKit • Port Scanner — open ports on a host • STUN / NAT — public IP and NAT type for VoIP, gaming and peer-to-peer • VPN Check — whether a VPN is active, your public IP and NAT type, and whether your DNS answers match an encrypted resolver • IPv6 Check — connectivity, NAT64 / DNS64, v4 against v6 UTILITIES • Subnet Calculator, IP Geolocation • Network Passport — a shareable summary of the connection • History — every diagnostic you have run EVERY RESULT EXPORTS AS TEXT OR PDF Text pastes into a support ticket or forum thread; a PDF attaches to a mail to your provider. 13 languages, Arabic with full right-to-left support. In-app help on every tool explains how to read the result. Made for network engineers, sysadmins, gamers and anyone who has ever argued with their ISP. No account. No subscription. Results stay on your iPhone unless you share them. The app shows ads and collects usage analytics, like which tools you open, not what they measured. A one-time purchase removes ads.

Where should the router go? WiFi Coverage Survey answers that by measuring, not guessing — with a coverage heatmap drawn over your own floor plan, a ranked report of every spot, and a separate internet speed test. Start a recording, walk your home, and name the spots you care about — the desk, the couch, the far bedroom. The app measures continuously while you walk and produces a report ranking every spot, so you can see exactly where coverage falls apart and which access point is responsible. WHY NOT JUST A SIGNAL BAR iOS does not give apps the raw signal strength, and even where it is available it is a poor predictor: Wi-Fi hides a weakening link behind retransmission, so everything looks fine right up until the connection collapses. WiFi Coverage Survey instead measures the things that degrade early — loss on large frames, TCP retransmission and failed connections, tail latency, throughput, and the negotiated PHY mode — and combines them into a single 0–100 score. WHAT YOU GET • A live score, dial and chart while you walk • Mark This Spot — captures the 10 seconds before you press, so typing a name never pollutes the measurement • A ranked table of every spot, best to worst • Per access point breakdown: which node served which part of the walk, so you know which one to move • Outage and handover detection • A floor plan you sketch yourself, with your marked spots on it and a coverage heatmap over the walls • Placement advice based on the recording • CSV and JSON export • History, so you can compare before and after moving the router INTERNET SPEED TEST A separate tab measures the line itself rather than the Wi-Fi: download and upload over parallel streams, idle latency and latency under load, and which Cloudflare edge is serving you. Runs are kept in a history on the device so you can compare them. Five tests a day. PRIVACY The survey is measured against your own router and stays on your device — nothing is uploaded. The internet speed test is the one exception: it exchanges traffic with our own test server, and only when you start it. Location permission is requested only because iOS will not reveal the Wi-Fi network name to an app without it — your location is never recorded or shared. NOTES Recording needs the screen on, because iOS does not allow Wi-Fi sampling in the background. Measurement is deliberately intensive, so expect noticeable battery use during a walk. The survey's throughput figure is relative to your own router and is not a measure of your internet connection — the speed test tab does that.