Sound Meter & Decibel Meter

Sound Meter & Decibel Meter turns your phone into a sound level meter. Measure noise in decibels anywhere: at home, at work, in a classroom, at a concert, on the street or next to a motorcycle. No ads, no tracking, nothing collected.

A big needle gauge and a large dB(A) number show the level live, with the average (AVG), minimum and maximum for the session. A plain-language reference tells you what the level means — 70 dB is a busy restaurant, 90 dB a motorcycle — and the colored level bar shows at a glance when noise gets harmful.

WHAT YOU GET
• Real-time decibel meter with needle gauge, AVG / MIN / MAX and a session timer
• Live noise chart of the last 30 seconds, and a full-screen landscape chart
• Reference chart from 0 to 140 dB with everyday examples
• Calibration: adjust the reading against a reference sound level meter
• A-weighting like human hearing, Fast or Slow response
• Save measurements and see them later with a graph and the loudest moments
• Frequency spectrum with the peak frequency in Hz (Pro)
• Record the sound together with the measurement and play it back (Pro)
• dB(C) and dB(Z) weighting, unlimited records and CSV export (Pro)
• Dark and light themes, 23 languages

WHY PEOPLE USE IT
Check if your neighbors, a construction site or road traffic are too loud, keep a record of noise, test your car or motorcycle exhaust, keep a classroom calm, protect your hearing at concerts and in workshops, or set up speakers at home.

ABOUT ACCURACY
Phone microphones are tuned for the human voice, and most cut off very loud sounds above about 100 dB. For better results, calibrate the app once against a real sound level meter. Use it as a helpful everyday tool, not as a certified instrument.

PRIVACY
The microphone is only used to measure. Sound is analyzed on your phone and never sent anywhere; audio is kept only when you save a record, and it stays on your device.

PRO — ONE PURCHASE, NO SUBSCRIPTION
Unlock the frequency spectrum, audio recording with playback, unlimited records, dB(C) and dB(Z) weighting and CSV export with a single purchase. The sound meter, chart, reference chart and calibration are free forever.

Works offline.