RTA · SPL · Loudness — free, no audio interface required

A professional
acoustics lab in your pocket

Real-time spectrum analysis, sound-level metering and audio-file inspection — built natively for iPhone & iPad. The core tools are free. Pro unlocks unlimited measurement and PDF/CSV/JSON reports.

Download on the App Store See what it measures →

Algorithms implemented with reference to IEC · ISO · ASTM · ITU-R standards

Languages supported

FFT 65k

Down to ~0.73 Hz resolution

1/24

Octave-band resolution

Free

RTA · SPL · file analysis

Built for the people who measure sound

One app, three serious workflows

From a city-noise complaint to tuning a cinema to passing an EBU R128 loudness check — Soniclyze covers the measurement that matters.

Noise & environmental monitoring

Long-duration sound-level measurement with full statistics and automatic zone-limit assessment. Interrupted by a call? It pauses and marks the gap for you.

A/C/Z weightingLeq · Lmax · L10/50/90SELNIOSH/OSHA doseGB 3096-2008

Live sound engineers

High-resolution real-time spectrum with feedback detection, mic-sensitivity correction and five reference room-correction target curves. A/B/C/D snapshots for before-and-after tuning.

RTA ~11.7 HzEPPO ~0.73 Hz6 windows · Flat-TopFeedback detect

Broadcast, podcast & mastering

Integrated / Short-term / Momentary LUFS, LRA and 4× oversampled true peak, checked against 11 industry loudness targets. Plus anomaly, phase and mono-compatibility analysis.

EBU R128ATSC A/85True Peak ×48-band phase

What you actually see

Lab-grade instruments, redrawn for touch

● Sound Level Meter

Measure noise the way a meter does — for hours

Full A/C/Z weighting and Fast/Slow/Impulse time constants, with adaptive noise-event detection that logs each event's level, duration and rise/fall rate.

Complete statistics — Leq, Lmax, Lmin, Lpeak, L10, L50, L90 and SEL.

Occupational dose — NIOSH / OSHA noise-exposure calculations.

Never lose a reading — a call or Siri pauses the run and marks the interrupted interval.

● Real-Time Analyzer

See every band, down to sub-bass

Standard ~11.7 Hz resolution, with an EPPO low-frequency mode reaching ~0.73 Hz and FFT up to 65536. Octave resolution from 1/1 all the way to 1/24.

Six window functions — including Flat-Top for pure-tone amplitude work.

Real-time feedback detection with adjustable sensitivity.

Four A/B/C/D snapshots overlaid for before-and-after comparison.

● Loudness & File Analysis

Pass the loudness check before you upload

Play and analyze at once — waveform, spectrum and spectrogram views stay in sync as you audition. Compliance is checked against 11 broadcast, streaming, podcast and cinema targets.

Integrated / Short-term / Momentary LUFS, LRA and 4× oversampled true peak.

Anomaly detection — DC offset, clipping, spectral notches, transcoding artifacts and band limiting.

Multi-band phase & polarity analysis with mono compatibility.

“Picked this up to do some quick room analysis before treating my home studio. The frequency sweep and RT60 readings were surprisingly close to what I got from my UMIK-1 + REW setup – within about 1-2 dB on most bands, which is more than good enough for a phone app. The …”

GildedWater · ★★★★★ · App Store review · 🇺🇸 United States
Individual user experience — actual measurement accuracy depends on your device and calibration and isn't guaranteed.

And there's a full toolbox

Everything else an acoustician carries

Signal generator

Sine, sweep, noise & test tones.

Parametric EQ designer

Shape filters by band & Q.

FIR filter designer

Tap-by-tap impulse design.

Acoustic calculators

Conversions & room math.

Frequency-response export

Take curves out of the app.

Mic sensitivity correction

Calibrate via mV/Pa or 94 dB.

A/B/C/D snapshots

Compare tunings instantly.

PDF / CSV / JSON reports

Share results that hold up.

Free to start

Real measurement, free. Pro when you ship.

The measurement functions themselves — real-time display, analysis and history — are completely free. Report export and unlimited runs are the Pro benefit.

Free

No account, no audio interface required