Decibel Meter: Sound Level dB

Turn your iPhone into a sound level meter. Measure ambient noise in decibels with min/max/avg tracking, real-time charts and CSV export. No ads, ever.

Decibel Meter turns your iPhone into a fast, accurate sound level meter. Measure ambient noise in decibels (dB) anytime, anywhere — at home, at work, at concerts, in cafes, or in the gym. Clean design, instant results, no clutter, no ads.

WHAT YOU CAN DO

• Live Decibel Reading Watch sound levels update in real time, with a colorful indicator that shifts from green (quiet) through yellow (moderate) to red (loud).

• Min, Max & Average Track the quietest moment, the loudest peak, and the average noise level of every session.

• Real-time Sound Chart (Premium) See your environment's noise pattern visualized as a smooth live chart.

• Measurement History (Premium) Save up to 50 sessions with date, min, max, average and duration. Compare locations, times of day or before/after changes.

• CSV Export (Premium) Export your full history as a CSV file. Share it via email, AirDrop or any app — perfect for reports, schoolwork or simple personal tracking.

• Manual Calibration (Premium) Fine-tune readings against a reference device with a ±20 dB offset slider that fits your hardware.

WHY DECIBEL METER

• Privacy first — all measurements stay on your device. No accounts, no cloud, no tracking. • 100% offline — works without an internet connection. • Zero ads — we don't show ads in any of our apps. Ever. • Beautifully simple — built natively for iOS with a clean, minimal interface.

GREAT FOR

• Checking how loud your office, classroom or living room really is • Measuring noise levels at concerts, restaurants, gyms or events • Comparing the quietness of different sleeping spots • Curious kids, students and tinkerers learning about sound • Anyone who's ever wondered "how many decibels is this?"

PREMIUM

Unlock advanced features with a one-time premium upgrade — no subscriptions to forget about. Premium adds the real-time chart, measurement history, CSV export and manual calibration.

IMPORTANT

This app is intended for entertainment and informational use only. It relies on your device's built-in microphone, which is not a calibrated laboratory instrument. Do not use Decibel Meter as a substitute for a professional sound level meter, occupational safety equipment, or any medical or legal measurement.

Privacy Policy: https://docs.google.com/document/d/1VIB9JpstwHkzFK1qt1sQG2_SpS8igRyo7RmXM3TKgFY/edit?usp=sharing Terms & Conditions: https://docs.google.com/document/d/1fp3oD34VyItpvPAFvjGB3d8NF79wjSEBsmqHLfMaJQU/edit?usp=sharing