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Measure Decibels
Tools & Utilities · Made for iPhone
decibel meter app for iPhone
Measure sound levels with your iPhone.
Measure Decibels uses the iPhone microphone to display real-time sound levels, frequency information and measurement history. It is useful for awareness and comparisons, while calibrated equipment remains the right choice for compliance or professional acoustic work.
A portable decibel meter app for quick environmental checks.
iPhone appBuilt for iOS
Free downloadPlans shown by Apple
Real screenshotsFrom the App Store listing
IndependentMade by Anmol Rattan
Quick answer
Can an iPhone measure decibels?
Yes. A decibel meter app can use the iPhone microphone to estimate the surrounding sound level in dB. Results vary with the phone, case, microphone condition and calibration, so an app reading should not replace a certified sound level meter where accuracy or compliance matters.
How it works
A useful result in three clear steps.
The app handles the fast first pass. You keep control of the final check, especially when condition, safety or accuracy matters.
Hold the phone consistently
Keep the microphone unobstructed and avoid changing position during a comparison.
Read the level and trend
Review the live dB value, frequency display and saved history in context.
App preview
See the iPhone experience before you install.
These are current product images supplied through the live App Store listing.
Product capabilities and purchase options were checked against the current App Store listing. The listing remains the source of truth for availability and pricing.
What it does
Focused features for the job at hand.
No padded feature list—just the core workflow described in the current product listing.
Live dB readings
See an immediate estimate of surrounding sound pressure level.
Frequency analyzer
Review a visual breakdown of frequency information in the measured sound.
Measurement history
Track readings over time to compare environments or changes.
Fast noise checks
Use the phone already in your pocket for quick sound-awareness checks.
Guides & free tools
Go deeper before you make a decision.
Use the app for the camera-first workflow, then use these focused resources for the details around it.
Related resource
Noise exposure calculator
Estimate daily sound dose from decibel level and exposure time.
Learn more → Related resourceOnline decibel meter
Try the free browser-based sound level meter.
Learn more → Related resourceOnline mic test
Check microphone input and levels directly in your browser.
Learn more →Frequently asked questions
Clear answers before you download.
Short, specific answers about what Measure Decibels can—and cannot—do.
Can I use my iPhone as a decibel meter?
Yes. Measure Decibels uses the iPhone microphone to estimate current sound levels and show them in dB.
How accurate is a decibel meter app?
Accuracy varies by iPhone model, microphone, case, environment and calibration. It is best for awareness and comparisons, not certified measurements.
Can I use the app for workplace noise compliance?
Do not use a phone app as the only compliance measurement. Occupational decisions generally require approved, calibrated equipment and the applicable local standard.
Does Measure Decibels show frequency information?
Yes. The current App Store listing includes a frequency analyzer along with live dB readings and historical tracking.
Is Measure Decibels free?
The app is currently listed as free to download, with basic features described as free. Check the App Store purchase screen for the latest offer details.
Made for iPhone
Try Measure Decibels.
A portable decibel meter app for quick environmental checks. Free to download; Apple shows any optional purchase before you confirm.