Coming soon to Google PlayDecibel meter app for AndroidSound Meter
A sound level meter for your phone. A big, calm number in dB(A), a needle that follows every change, and an honest line that tells you how far to trust the reading.
What it does.
Everything below is in the app today. Nothing is promised for later.
Measure
- Live level in dB(A), the weighting that matches how loud sounds seem.
- Fast or Slow response, like a real sound level meter.
- Minimum, average (Leq), maximum and peak since you last reset.
- The last 60 seconds as a graph, and a plain comparison: “Like a busy street”.
Honest readings
- Every reading says how far to trust it: “±3 dB · not calibrated”.
- Too loud for the microphone? It says so instead of a wrong number.
- Quieter than the microphone can hear? It shows “≤ 40”.
- Calibrate next to a meter you trust, in a few seconds.
Noise log (Pro)
- Up to 24 hours with the screen off, one reading a second, with a Stop button in the notification.
- The whole night as a chart; pinch to zoom.
- Average, maximum, L90, L10 and time above 55, 65 and 75 dB.
- Share a PDF report or a CSV file.
Free, and Pro
- Free: the meter, graph and calibration.
- Pro, one payment: noise log and reports, spectrum, C and Z weighting, five more colours.
- No subscription, no ads. Sound is never recorded.
A phone microphone is not a certified sound level meter. Use the readings as a guide, not as legal proof.
Questions
Is Sound Meter free?
Yes. The dB(A) meter, Fast and Slow, minimum, average, maximum and peak, the 60-second graph and calibration are free. Pro is one payment for the noise log, PDF and CSV reports, the spectrum, C and Z weighting and five more colours. No subscription, no ads.
How accurate is a phone sound meter?
About ±3 dB before calibration, in the range the microphone can hear. Every reading says how far to trust it. Calibrate it next to a meter you trust and it gets closer. A phone is not a certified sound level meter, so use it as a guide, not as legal proof.
Can it log noise all night with the screen off?
Yes, with Pro. It saves one reading a second for up to 24 hours, with a notification and a Stop button. In our test on a Galaxy S23 it logged for 61 minutes with the screen off and in deep sleep, with no gaps.
Does it record what people say?
No. It never records, saves or sends sound. It keeps only the numbers: one level per second.
Why does it show “≤ 40” in a quiet room?
Phone microphones cannot hear very quiet sounds well. When it is quieter than the microphone can measure, the app says so instead of guessing a number.
When is it on Google Play?
Soon. The app is finished and in testing. This page will link to Google Play on the day it is out.