mDNSShark vs MeterWorks Spectrum Analyzer

mDNSShark is an open-source iPhone app that shows what is on your local network. It uses Multicast DNS (mDNS), DNS-SD, and SSDP to find printers, media servers, IoT gadgets, and other services on your Wi-Fi, with no setup. WHAT YOU GET - Device discovery: Bonjour/mDNS, SSDP, and optional subnet scans, with manufacturer lookups. - Security assessment: flags risky exposed services and checks device manufacturers against CISA's Known Exploited Vulnerabilities catalog and the NVD. - Packet capture: see which hosts your phone talks to (DNS, SNI, ports) and export to pcap for Wireshark. - TLS Inspection (optional subscription): decrypt and read your own device's HTTPS traffic using a certificate you install and trust. PRIVACY Scans and analysis run on your phone. Your device list and scan results are never uploaded. There is no telemetry, no analytics, and no trackers. Two things leave your device, and both are visible to you: DNS lookups go to the resolver you choose (Google Public DNS by default), and the Refresh CISA Data button you tap yourself downloads CISA's public catalog and asks the NVD about device vendors seen on your network. The only permission the app needs is local network access. SUBSCRIPTION TLS Inspection Monthly is an auto-renewing monthly subscription. The price and any free trial are shown in the app before you subscribe. Payment is charged to your Apple Account at confirmation of purchase, or when a free trial ends. The subscription renews automatically unless you cancel at least 24 hours before the end of the current period. Manage or cancel any time in Settings > Apple Account > Subscriptions. Discovery, scans, and the Security tab are free. OPEN SOURCE mDNSShark is built by engineers who like transparent, lightweight tools, and it is open to anyone curious about local networks. Report bugs, suggest features, or contribute code in our public repository: https://github.com/Shapehaven-Innovations/mDNSShark Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://shapehaveninnovations.com/privacy.html

A tone you can't place — the motion-sensor deterrent next door, a beep from inside a wall, a hum from the basement. You can barely hear it, but it's there. MeterWorks Spectrum Analyzer makes it visible: live spectrum, automatic logging, an evidence PDF — on your device, no account, no subscription. MEASURE & CIRCLE IN • Live spectrum, linear or logarithmic axis, stepless pinch-zoom in frequency AND level • Peak detection with the resolution stated openly, 60-second waterfall • Device self-test "What can YOUR iPhone do?" shows the real usable top frequency before you buy • Walk mode: keep measuring while you walk the property, every point on the map carries its level — you circle in on a source, you don't locate it WATCH BANDS & LOG — THE EVIDENCE CHAIN • Pro: name your own watch bands ("cat-deterrent window" 16–24 kHz, "hum" 20–200 Hz, fully custom), each with its own threshold • Pro: automatic events — when a band crosses its threshold, the entry writes itself: start, duration, classification • Pro: walk report as PDF with a map snippet, a point table, and band spectra — plus CSV • Quiet references: save silence at a location, later measurements show the rise over it (1 free, more with Pro) DOCUMENT • PNG export with footer — free • Pro: multi-page PDF report with statistics, spectrogram, and event table • Pro: CSV export of the band levels — spreadsheet-ready FREE VS. PRO — NO SURPRISES Free: live spectrum with full zoom (3 sessions of up to 30 seconds each), waterfall, self-test, limits page, A/B comparison, 1 reference, three recordings of 10 seconds each, one walk of up to 30 seconds, PNG export. Pro is a single one-time purchase (no subscription, ever): watch bands, unlimited walks with report PDF and CSV, more references, unlimited live view and recordings, log PDF, CSV — all future Pro features included. WHAT THIS APP CANNOT DO — HONESTLY What kids can hear, this app can see: the audible range up to 24 kHz sits fully inside the iPhone microphone's window. True ultrasound above that is beyond any iPhone — and beyond any app that claims otherwise (the Nyquist limit of 48 kHz sampling). What holds up is the comparison within the same band over time, not an absolute dB value. This app documents, it doesn't judge: no "court-proof" claims — a clean log with openly stated limits. TYPICAL USES Circle in on a noise source in the garden or neighborhood · identify a sound you can barely hear yourself · confirm a motion-sensor or cat-deterrent frequency · document a hum inside the house NO SUBSCRIPTION. NO ADS. NO TRACKERS. All measurement data stays on your device — only band-aggregated spectra, never audio. MeterWorks is a family of honest measurement apps: Vibrometer, Sound Meter, Teslameter — Spectrum Analyzer is the fourth.