Pitch Hunter
A pocket lab for the sounds around you — and the sounds you can't quite hear. Point your phone at a speaker, a mosquito, or a wall that hums at 2 a.m. and see what's actually in the room.
Get in touch Privacy policyWhat it does
Listen mode
Live spectrogram, pitch tracker, and a built-in sound classifier that tags tones, noise, speech, and transients in real time.
Tone generator
Any frequency from 20 Hz to 22 kHz with clean sine, square, triangle, or sawtooth waves.
Calibration sweep
Hidden long-press sweep that measures your phone's actual frequency response — the kind of self-test usually reserved for measurement mics.
Repel mode
Tuned ultrasonic tones for common pests, with interval timers and auto-shutoff. No snake-oil claims — the in-app disclaimer explains what the science does and doesn't support.
Critters mode
A rotating library of animal calls organized by region — whale song, bat echolocation, frog choruses, and more.
Accessibility-first
VoiceOver labels everywhere, full Dynamic Type support, and a Reduce Motion opt-out.
- Works entirely on-device. Nothing leaves your phone.
- No tracking, no analytics, no accounts.
- One-time Pro unlock. No subscription.
- Built by one developer on Apple frameworks.
Support & feedback
Bug reports, feature requests, or notes on what's working for you — I read every message.
Important note
Pitch Hunter is an enthusiast tool, not a medical device. Ultrasonic tones in Repel mode are below the level of general audibility but may still be perceptible to pets and young children — use at sensible volumes, especially around animals.