Sound level meter, spectrum analyzer and camera overlay

Decibel Meter Pro

Audio Spectrum - Sound Measure

Precise sound level measurement in real time for reliable dB readings.

See measurement tools

For studios, events, classrooms, workshops, construction sites and everyday noise checks.

82 dB SPL Moderate

dB(A) + dB(C)Switch between weighted and SPL measurement modes.

SpectrumSee frequency energy from low rumble to high hiss.

Camera OverlayCapture photos and videos with live dB data.

PDF + CSVExport documented measurements with Pro features.

Realtime measurement

Readable dB values without a cluttered cockpit.

Decibel Meter uses iOS measurement mode, spectrum analysis and stable smoothing to keep current, minimum, maximum and average values easy to read while the sound changes around you.

Multiple dB modes

Measure in dB SPL, dB(A) or dB(C) depending on whether you need raw level, human-weighted loudness or low-frequency-aware readings.

Live spectrum

A realtime frequency view helps identify whether noise comes from bass, machinery, speech, traffic or high-frequency sources.

Reference categories

Color-coded loudness ranges help you interpret measured levels quickly, from quiet rooms to dangerous noise.

Documentation

Turn a moment of noise into a useful record.

Save measurements with history, audio, photo or video context. When a reading matters later, the app keeps more than just one number.

Data, audio, photo and video

Record measurement data alone or capture sound, images and camera video with a live dB overlay.

History and details

Review average, min and max values, device info, microphone, calibration offset and measurement settings.

Location and notes

Add context for documented measurements when you need to remember where and why a reading was taken.

Pro workflow

Built for real checks, not just a novelty number.

Use the app for music, environmental noise, studio monitoring, events, education, workshops, construction sites and everyday questions about loudness.

Calibration

Adjust measured levels against a known reference so readings can match your measurement setup more closely.

Saved overview

Browse compact, extended and map-based views, mark favorites and manage multiple measurements.

Export

Create PDF or CSV exports when measurements need to move into reports, logs or customer communication.

FAQ

Useful answers before you measure.

Which measurement types are supported?

The app supports dB SPL, dB(A) and dB(C) measurement modes.

Can I record video with the measurement?

Yes. Camera mode can record photos or videos with live dB overlay information.

Can I export measurements?

Yes. PDF and CSV export are available as Pro features.

Can a phone replace certified equipment?

No phone app should be treated as a certified class sound level meter. Decibel Meter is useful for practical checks, documentation and relative analysis, but legal or safety-critical measurements require certified hardware.

Ready to measure?

Open Decibel Meter and make sound visible.

Get Decibel Meter

CLIDOapps

More focused apps from CLIDOapps.

LED Banner PROLED marquee, text ticker and big message display app for iPhone, iPad and Android. Sleep Sounds PROSleep sounds, relaxing noise and custom ambient mixes for iPhone and iPad. QR Code Reader PROQR code and barcode scanner with QR creation, folders, bulk scan and CSV export. PrompterlyProfessional teleprompter app with remote control support for iPhone and iPad.