Measure sound levels with your device's microphone. Track noise over time, set alerts, and log recordings with notes and locations. Export reports for personal records.
1.9.0
October 28, 2026
New in 1.9.0: Spectrum analyser. Tap "Spectrum" on the meter screen and watch the sound split into 10 octave bands, from 31 Hz to 16 kHz, in real time, with the dB level of each band and the dominant frequency (peak). Handy for telling whether noise is low (traffic, machinery, the neighbour's bass) or high (alarms, squeals), and for checking speakers or rooms. It's there for everyone, no unlocks needed. We've also tidied up stability and added support for the latest iPhones, including iPhone Duo. If the app's been useful, a review goes a long way for us. If something's not right, drop us a line from Settings.
MoreDecibel PRO 1 year subscription
Decibel Meter is a sound level meter app that uses your device's microphone to measure and log noise levels. It provides live dB readings, charts, and noise dose calculations, with options to save and export recordings.
Yes, Decibel Meter is free to download. It offers a range of features for free users, with optional in-app purchases for premium features and to remove ads.
Yes, the free version of Decibel Meter contains Google ads. Users can opt to watch an ad to unlock a single export or purchase premium features to remove advertisements.
Decibel Meter is supported on iPhone and iPad devices. It is rated for ages 4 and up.
While the app provides a built-in correction, phone microphones are not certified sound meters. For better accuracy, calibration against a reference meter is recommended. It is not a certified Class 1 or Class 2 meter.
Premium features include ad removal, a year of statistics, session comparison, a noise map, longer video with dB overlay, custom alert thresholds, background monitoring, and extra themes. These are available through weekly, monthly, yearly, or lifetime purchases.
The latest version, 1.9.0, was last updated on October 28, 2026. This indicates regular updates to improve functionality and address issues.
No, Decibel Meter provides personal records and is not considered legal evidence. The app explicitly states it is not a certified meter or dosimeter.
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