Pitch Hunter vs MorseScope

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

Decode Morse from sound or flashing light. MorseScope is an offline Morse toolkit for iPhone and iPad. Turn audio, light, and written dots and dashes into text, then build your receiving and sending skills. AUDIO AND WRITTEN MORSE • Decode live microphone audio with automatic carrier and timing estimates, key state, speed, level, and confidence. • Import WAV, MP3, M4A, or AAC; try the built-in sample or translate written Morse. • Play recordings with time-aligned text. Inspect each character's original Morse, confidence, and time; jump to uncertain characters, correct a position, or restore the original. • Decoder Pro adds 1–8× synchronized spectrograms, carrier focus, timing-supported alternatives, carrier tuning, WPM lock, sensitivity, and filtering. Review the bounded ten-second live waterfall after listening stops. • Keep audio-decoding results in the local Session Library. Source audio and graph data are not saved there. Light-decoding results stay in memory only. LIGHT DECODER Point the rear camera at one flashing screen or flashlight. Move the generous target by touch or accessible controls, allow the signal to calibrate, and follow live Morse and text. Copy the result when finished. Start at 5–7 WPM with a steady phone and a clear source. Lighting, distance, movement, display flicker, and camera timing affect reception. This is for learning and short messages, not emergencies. Camera permission is requested only on Start Camera; no images or video are saved or uploaded. ENCODE AND SEND Turn text into International Morse, play or copy it, and export WAV/M4A audio. Send visible Morse through Screen Flash or the rear Flashlight at up to 7 WPM, without a 60-second cutoff. Haptic output supports transmissions up to 60 seconds. Stop visible output if it causes discomfort. PRACTICE AT YOUR PACE Learn with beginner lessons, Koch character groups, Farnsworth spacing, daily drills, and saved progress. Build custom receive drills and WPM ladders. Practice callsigns, prosigns, Q-codes, QSO exchanges, and sending rhythm with an adaptive CW key. FREE AND PREMIUM Free includes text conversion, beginner and Koch learning, daily practice, selected-character drills, the Send key, Callsigns, and character correction/restore. Free audio playback supports 60 seconds per transmission. Microphone and light decoding allow 30 seconds per session after the first signal lock; later signal loss does not pause that allowance. Free imported files may be up to 30 seconds. Start another free live session whenever you wish. Premium unlocks longer audio playback and decoding, light decoding without a session time limit, WAV/M4A export, Decoder Pro, the complete Session Library, advanced coaching and history, Guided Sending, signal conditions, saved custom presets, and WPM ladders. Choose a weekly auto-renewing subscription or a one-time lifetime purchase. Both unlock the same Premium features; current localized prices appear in the app. PRACTICAL LIMITS Use a clear 300–2,000 Hz audio carrier. Imports support common uncompressed mono/stereo PCM WAV, MP3, and unprotected AAC in M4A or ADTS; protected audio and ALAC are unsupported. Imported files are limited to 10 minutes/128 MB; audio playback and export to 8 minutes. Camera capture runs in the foreground and stops for interruptions, frame stalls, or excessive heat, including with Premium. PRIVATE BY DESIGN Core processing stays on your device. No account, ads, tracking, or analytics. Microphone samples stay in bounded memory and are discarded on Stop. Network access is used for App Store purchases and subscription management. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy: https://whitewhalesoft.com/apps/moorsecodeaudiodecoder/privacy Support: zhaoxiaojian@hotmail.com