# Pitch Hunter — Ultrasonic detector & tones > iPhone-based ultrasonic detector, tone generator, and sound analysis utility. (iPhone/iPad app by Jared Grover.) - Source: https://appshunter.io/ios/app/pitch-hunter/id6762569409 (this page in markdown: same URL + `.md`) - Developer: [Jared Grover](https://appshunter.io/developer/1894706722) - Category: Utilities, Education - Price: Free - Rating: 5.00/5 from 1 App Store ratings · 1 written reviews indexed - Age rating: 4+ - Requires: iOS 17.0 · 1 MB - Languages: American English - Released: 2026-04-21 - Data updated: 2026-06-26 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/pitch-hunter/id6762569409/reviews.md ## What is Pitch Hunter? Pitch Hunter turns your iPhone into a pocket lab for the sounds around you — and the sounds you can't quite hear. Point it at a speaker, a mosquito, or a wall that hums at 2 a.m. and see the frequency, the note name, and the energy across the spectrum in real time. Pitch Hunter listens up to the limit of your microphone and shows you what's there. — What's inside — DETECT A live 48 kHz spectrogram with a peak-hold pitch tracker and a lock-state gauge that firms up as a signal holds steady. Band presets for Mosquito (14–20 kHz), Electronics (10–20 kHz), Coil Whine (15–22 kHz), CRT Flyback (8–12 kHz), and Full Range (2–22 kHz). A built-in classifier tags mosquito wingbeats, flyback whine, ultrasonic repellers, and switching-supply noise. The gauge reads dB above a per-band ambient baseline the app measures on the fly — each band remembers the lowest baseline it has ever seen, so moving somewhere quieter sharpens the reading. GENERATE Play any frequency from 20 Hz to 22 kHz with clean sine, square, triangle, or sawtooth waveforms. Useful for testing speakers, checking hearing thresholds, tuning instruments, and hunting rogue room resonances. A built-in Hearing Test sweeps your audible range and plots where your ears roll off. A Room Resonance Finder sweeps a tone while listening back, and flags the frequencies your walls are amplifying. REPEL Tuned ultrasonic pulses in the 15–22 kHz band for common pests, with adjustable duty cycle, auto-shutoff up to 8 hours, and a first-run safety confirmation. Works only while the app is foregrounded — the tone cannot run in the background. A short disclaimer explains what the science does and does not support. No snake oil. CRITTERS A curated library of animal calls organized by region — Aquatics (humpback whale, orca, bottlenose dolphin, beluga, sperm whale, blue whale), Africa, Americas, and Asia. Each species card shows the natural frequency range, the subset your iPhone speaker can actually reproduce, and a stylized preview. Europe and Down Under are scaffolded for upcoming updates. CALIBRATION SWEEP Long-press the header to kick off a hidden sweep that measures your specific phone's microphone + speaker response curve. The app adapts its scale to your hardware so the numbers on screen are meaningful — the kind of self-test that usually needs a measurement mic. — Built for — • People who want to see what sound is actually in the room, not a pretty animation • Pest-control pros tracking ultrasonic deterrents • Electronics hobbyists chasing switching-supply noise • Field sound designers scouting mosquito-free locations • Biology students comparing marine-mammal vocalizations • Anyone whose hearing rolls off above 14 kHz and wants to see what they're missing — Privacy & build — • All analysis runs on device. No audio leaves the phone. • No account, no cloud, no tracking SDKs, no network calls. • Microphone permission only. • Accessibility-first: VoiceOver labels everywhere, full Dynamic Type, Reduce Motion opt-out. • One-time Pro unlock for Repel and Critters. No subscription. — Important — Pitch Hunter is an enthusiast tool, not a medical device. It does not diagnose hearing loss, tinnitus, or infestations. Repel-mode tones are below the level of general audibility for most adults but may still be perceptible to pets and young children — use at sensible volumes, especially around animals. Questions, feature requests, or bug reports: pitchhunter@jaredgrover.com ## Key features - Real-time spectrogram with peak-hold pitch tracker - Band presets for various ultrasonic frequencies - Built-in classifier for common ultrasonic sounds - Tone generation with multiple waveforms (20 Hz - 22 kHz) - Automated hearing test and room resonance finder - Ultrasonic pest repeller with adjustable settings - Library of animal calls organized by region ## Recent user reviews (1 of 1) All indexed reviews: https://appshunter.io/ios/app/pitch-hunter/id6762569409/reviews.md ### 5/5 — Fun, functional, and educational *2026-04-24* This app is awesome it works exactly as advertised. It helped me find a high pitched noise that has been bugging me. The critters feature is what really sets it apart. It’s so cool being able to explore different animal frequencies. It also has repellent sounds for critters and even mosquitoes! Highly recommend checking it out! ## Frequently asked questions about Pitch Hunter ### What can Pitch Hunter detect? Pitch Hunter can detect a live 48 kHz spectrogram with a peak-hold pitch tracker. It includes band presets for mosquitoes, electronics, coil whine, CRT flyback, and full range, with a built-in classifier for common ultrasonic sounds. ### Can Pitch Hunter generate sounds? Yes, Pitch Hunter can generate any frequency from 20 Hz to 22 kHz using clean sine, square, triangle, or sawtooth waveforms. This is useful for testing speakers, checking hearing thresholds, and tuning instruments. ### Does Pitch Hunter have an ultrasonic pest repeller? Yes, Pitch Hunter features tuned ultrasonic pulses in the 15–22 kHz band for common pests. It offers adjustable duty cycle and auto-shutoff up to 8 hours, but only works while the app is in the foreground. ### What kind of animal calls are included in Pitch Hunter? Pitch Hunter includes a curated library of animal calls organized by region, such as Aquatics (humpback whale, orca, dolphin) and calls from Africa, the Americas, and Asia. Europe and Down Under are planned for future updates. ### How does Pitch Hunter calibrate to my device? By long-pressing the header, you can initiate a hidden sweep that measures your specific phone's microphone and speaker response curve. The app then adapts its scale to your hardware for more meaningful readings. ### Is Pitch Hunter safe for all users? Pitch Hunter is rated for ages 4 and up. The pest repeller function includes a first-run safety confirmation and a disclaimer about the scientific support for its effectiveness. ### How often is Pitch Hunter updated? The latest version, 1.2, was released on April 26, 2026, following an initial release on April 21, 2026. This indicates a recent update and ongoing development. ### Does Pitch Hunter collect any user data? No, all analysis runs on the device, and no audio leaves the phone. The app does not require an account, use cloud services, tracking SDKs, or make network calls, only requesting microphone permission. ## Version history (last 3 releases) ### 1.2 — 2026-04-26 updated sounds of more animals "critters" ### 1.1 — 2026-04-23 New: Find the hum — an 8-point guided room scan with compass headings that maps where a steady sound is loudest, then exports a polar heatmap PDF. Also new: one-tap spectrogram share. Freeze the live spectrogram and share a PNG with the frequency axis baked in, plus a 5-second WAV clip. Plus polish: - Visible CALIBRATE button on the Detect tab - TUNE renamed to FLOOR for clarity - Dynamic Type scaling across the app - WCAG AA contrast pass on tab bar and secondary text - Repel speaker-safety cap scoped to running sessions only - Hearing-aid warning in Repel setup - Screen-lock note in the speaker warning 43 new unit tests and a pile of stability work under the hood.olish: - Visible CALIBRATE button on the Detect tab - TUNE renamed to FLOOR for clarity - Dynamic Type scaling across the app - WCAG AA contrast pass - Repel amplitude cap scoped to running sessions - Hearing-aid warning in Repel setup - Screen-lock note in speaker warning 43 new unit tests and stability work under the hood. ### 1.0 — 2026-04-22 No release notes. ## Related topics [high pitch sound detector](https://appshunter.io/ios/topics/high-pitch-sound-detector) · [ultrasonic detector](https://appshunter.io/ios/topics/ultrasonic-detector) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-26.*