NetDiag+ Network Toolkit

Fix your MTU in 30 seconds: Diagnostics > Path MTU > Discover, then set the value in your router. 25 network tools, one-time purchase, no subscription.

Your Zoom call is freezing. Your WireGuard VPN won't connect. Your smart TV keeps buffering. Someone might be leeching your Wi-Fi. You need answers — fast.

NetDiag+ puts 25+ professional network diagnostic tools in your pocket.

▸ DIAGNOSE NETWORK PROBLEMS • Ping & Traceroute — classic reach tests • MTR (My TraceRoute) — continuous traceroute with per-hop loss and latency, live updates • Path MTU Discovery — find the largest packet your VPN or tunnel allows • Speed Test — measure download / upload bandwidth • Site Reach — TCP + TLS audit of 35 popular sites, detects SNI blocks • HTTP/3 Tester — verify QUIC reach via a real handshake • Host Monitor — alerts when servers go down

▸ DNS, DOMAINS & SECURITY • NSLookup — query any DNS record type • Encrypted DNS — test DoH and DoT across Cloudflare, Google, Quad9, NextDNS • Whois — domain registration with parsed fields • SSL Checker — certificate inspector • TLS Inspector — which TLS versions and ciphers does a server support? • BGP Info — AS, peers, announced prefixes for any IP

▸ LOCAL NETWORK • Wi-Fi Info — current SSID, signal strength, IP details • LAN Scanner — discover devices on your local network • Bonjour Browser — find AirPlay receivers, printers, Chromecasts, HomeKit accessories • Port Scanner — check open ports on a host • STUN / NAT — public IP and NAT classification for VoIP, gaming, peer-to-peer • IPv6 Check — connectivity, NAT64 / DNS64, v4 vs v6 latency

▸ UTILITIES • Subnet Calculator — IP ranges, masks, broadcasts • IP Geolocation — locate any IP on a map • Network Passport — shareable network report card • History — every diagnostic you've run, exportable

In-app help on every new tool — tap (i) to read what it does, how to interpret results, and when to use it.

12 LANGUAGES: English, Russian, Ukrainian, German, Spanish, Portuguese (BR), French, Italian, Polish, Japanese, Korean, Turkish.

Made for network engineers, sysadmins, smart-home tinkerers, security researchers, and anyone who's ever yelled at their router.

No tracking. No account. No subscription. One-time IAP to remove ads — that's it.