404 Network vs Linkalyst

404 Network is the most comprehensive network diagnostics toolkit for iOS and macOS. Whether you're a network engineer troubleshooting connectivity or a security enthusiast auditing your home network, 404 gives you professional-grade tools in a beautiful native app. CORE TOOLS (FREE) • Real ICMP Ping with live latency charts • Visual Traceroute with hop-by-hop analysis • DNS Lookup with multiple server comparison • Speed Test with ISP detection • WiFi Info with signal strength monitoring • Port Scanner with service detection • Network Discovery with live topology map • Wake-on-LAN for remote device power • HTTP Probe for web server testing • Whois domain lookup PRO FEATURES • 70+ network diagnostic tools • Unlimited saved devices with background monitoring • Full port scan results with banner grabbing • 30-day diagnostic history with CSV/JSON/PDF export • Color tags, device groups, and topology presets • Community speed map — compare ISP performance in your area • Security Audit with vulnerability detection • WiFi Channel Analyzer • Smart Home device diagnostics • LAN Speed Test and Micro Speed Logger PRO+ ADVANCED • AI Assistant powered by Claude or on-device Apple Intelligence • AI-guided Security Audit and Penetration Test flows • Remote Sensor dispatch — run tools from multiple network vantage points • BLE Scanner Pro with GATT exploration and characteristic writing • NFC Toolkit — read, write, and clone-detect NFC tags • SSH Tester, SNMP Walker, Credential Checker • Subdomain Finder, CORS Checker, CSP Analyzer • Packet Crafter, Payload Library, Directory Scanner PRIVACY FIRST • No ads. No tracking. No analytics. • All network data stays on your device • Community features are opt-in with location rounded to ~500m • AI features require your own API key — we never see your data • Full GDPR compliance with data export and deletion TERMS OF USE Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Ping with a live latency chart, compare encrypted DNS (DoH and DoT) across resolvers, scan TCP ports, see where an HTTPS request spends its time and trace every hop, on iPhone and iPad. Test results are saved as reports you can search, compare and export. NEW IN 2.0 • Internet Speed Test: download and upload in one tap • Popular Services: how fast popular sites and services connect, ordered for your region • Discover: your gateway, Bonjour services and My Devices in one place • This Device: model, battery, storage and how this device connects • Share a Card: share a speed test, Popular Services or latency result as an image MEASURE THE CONNECTION • Chart Ping (ICMP) or UDP probes to up to six targets in one run • Typical latency (P50), slower requests (P95, P99), variation, timeout rate and longest timeout streak • Tap the chart to inspect a request and add notes as you test; timeouts are marked, never plotted as latency • Check a TCP port once or up to 50 times in a row SEE WHERE EVERY MILLISECOND GOES • Website Check sends five HEAD or GET requests in a row and can follow redirects hop by hop • Times DNS, TCP, TLS and time to first byte • Shows the HTTP protocol, TLS version, cipher suite and certificate chain, with expiry dates and SHA-256 fingerprints COMPARE DNS RESULTS • Query system DNS or choose UDP, TCP, DNS over HTTPS (DoH) or DNS over TLS (DoT) • Compare system DNS with up to four resolvers, each on its own protocol: fastest this round, record differences, response codes and failures • Presets for Cloudflare, Google and DNSPod, or a custom endpoint • A, AAAA, CNAME, MX, TXT, NS, SOA and PTR records, with TTLs • DoH and DoT apply to queries in Linkalyst; they don't change your device's DNS settings SCAN PORTS AND ORGANIZE DEVICES • Batch Scan in Port Check takes IPv4 lists or CIDR and known IPv6 addresses, with port presets or your own ranges: up to 256 addresses and 4,096 address/port pairs per run • Discover scans your network and lists devices that answer, with names, services and open ports; on iOS 27 also hardware addresses and makers • Keep targets, notes and related reports in My Devices, optionally grouped by network Discover lists only devices that answer the scan; one that's asleep or ignores probes won't appear. Batch Scan only makes TCP connections. ROUTES, SPEED AND ADDRESSES • Route Trace for IPv4 and IPv6: up to 30 hops, 1 to 3 probes per hop, optional hop hostname lookup • See this device's addresses and gateway; turn on IP Lookup in Settings for your public IP, region, network organization and ASN (via FreeIPAPI) • Download Test for a URL you choose, up to 64 MiB or 10 seconds • Throughput Test for upload or download to a free test peer you run on your own computer • Offline IPv4/IPv6 Subnet Calculator KEEP THE RESULTS • Search, star and tag reports; share them as JSON, or request-level data as CSV • Compare two runs with latency curves overlaid; repeated port checks, website checks, download and throughput tests and route traces are paired by target • Optional iCloud Drive report sync (off by default) BUILT FOR IPHONE AND IPAD • Follow a running test on the Lock Screen and, on supported iPhones, in the Dynamic Island, where you can also stop it • On iPad, open the tools or a single report in its own window Use network tests only on systems you own or have permission to test. UDP latency and Throughput Test require a compatible test peer; instructions are linked in the app. Linkalyst is free to download with all tools available. Linkalyst Plus, a one-time purchase, removes all ads and supports Family Sharing. Privacy Policy: https://linkalyst.entromoonic.com/privacy-policy Terms of Service: https://linkalyst.entromoonic.com/terms-of-service