Tone Audio Analysis vs Audiolyze

ToneListen is an audio analysis app for exploring the sound around you — including the near-ultrasonic, high-frequency tones the human ear can't hear. Point your device at any environment and ToneListen analyzes the live audio in real time. It reveals the frequency content of a space and detects high-frequency "tone tags" embedded in nearby audio, music, and media — turning your phone into a portable spectrum analyzer and tone reader. WHAT YOU CAN DO - Analyze any environment: Visualize live sound on a real-time spectrum view and see exactly which frequencies are present, from low rumble all the way up to near-ultrasonic. - Hear tone tags: Detect and decode high-frequency tone tags emitted by speakers, displays, TVs, and other media — including tones above the range of human hearing. - On-device media player: Play tone-safe sample files and watch their spectral content render live, so you can study how tone tags look and behave in different conditions. - Location-aware exploration: Use interactive maps to explore and reference where audio analysis is taking place. HOW IT WORKS ToneListen runs high-resolution frequency analysis entirely on your device. It listens through the microphone only while analysis is active, identifies tone patterns in the incoming audio, and displays the results instantly. Nothing needs to leave your phone for this to work. PRIVACY ToneListen uses the microphone solely for on-device audio and tone analysis. No voice, speech, or ambient audio is ever recorded, stored, or transmitted. Microphone input is processed in real time and immediately discarded. PRICING ToneListen is completely free to use. There are no in-app purchases, no subscriptions, and no paid digital content, features, or services unlocked inside the app. Every feature described above is available to all users at no cost, with no account or payment required. ToneListen is ideal for anyone curious about the sounds and signals in their surroundings — from audio enthusiasts and developers to anyone who simply wants to see and hear what is hiding just beyond human hearing.

Transform your iPhone or iPad into a professional audio analysis workstation. Audiolyze delivers real-time spectrum analysis, waterfall spectrograms, and oscilloscope visualization with the precision tools you need for sound engineering, acoustic analysis, and audio production. SPECTRUM ANALYZER Visualize audio frequencies in real-time with a high-resolution FFT spectrum analyzer. Choose from multiple display modes (dB, Amplitude, Power) and trace styles (smooth spline curves, linear, or classic bars). Switch between logarithmic and linear frequency scales, and select from multiple constant-Q resolutions for RTA analysis, from 1 octave down to 1/24 octave precision. WATERFALL SPECTROGRAM Track how your audio evolves over time with a scrolling 2D spectrogram display. Capture up to 20 seconds of frequency history to identify temporal patterns, transients, and spectral changes that a standard analyzer would miss. OSCILLOSCOPE Examine waveforms in the time domain with a responsive oscilloscope view. Multiple trigger modes (rising edge, falling edge, auto, free-run) help you capture stable waveforms, with adjustable amplitude scaling and trigger threshold controls. HARMONIC ANALYSIS Automatically detect and display harmonics with intelligent fundamental frequency tracking. View overtone relationships, cent deviations, and harmonic order labels overlaid directly on the spectrum — valuable for tuning, voicing, and timbre analysis. SPL REFERENCE LEVELS View relative sound pressure level readings with a built-in SPL meter. Calibrate against an external reference meter to align readings, with optional Z-weighting (flat response) or A-weighting (human hearing curve). Provided for reference and comparison; not a substitute for a certified, type-approved sound level meter. ADVANCED SIGNAL PROCESSING - Multiple FFT sizes (512 to 4096 samples) - Selectable window functions: Hann, Blackman-Harris, Flat-Top - Configurable frame overlap (0-75%) for improved averaging - Rolling window and exponential smoothing modes - High-pass and low-pass filters with adjustable slopes (6/12/18 dB per octave) CUSTOMIZE YOUR WORKFLOW - Peak hold display with decay - Snapshot comparison for before/after analysis - Visual glow effects for enhanced readability - Sparse or dense grid overlays - Save and recall custom presets for each visualization mode FOR SOUND ENGINEERS & MUSICIANS Whether you're a sound engineer tuning a PA system, a musician analyzing instrument tone, a podcaster optimizing room acoustics, or an audio enthusiast exploring the science of sound, Audiolyze provides the analytical depth you need in a beautiful, intuitive interface. EVERYTHING UNLOCKED Every feature is available from the moment you launch. No subscriptions, no in-app purchases, no paywalls, and no ads. Works on iPhone and iPad. Optimized for performance with GPU-accelerated Metal rendering. Available in 13 languages.