Decibel

Decibel is a clean, precise sound level meter built for musicians, sound engineers, and anyone who needs accurate dB readings without the clutter.
REAL-TIME MEASUREMENT

Measure ambient sound levels in decibels (dB SPL) with instant feedback. Choose between A, C, and Z weighting filters to match your measurement needs — A-weighting for perceived loudness, C-weighting for peak measurements, Z-weighting for flat frequency response.
SESSIONS & HISTORY

Every measurement session is automatically tracked. Stop the meter to save a session with a custom name, then revisit it any time to review the level history graph, peak values, and averages. Compare sessions to spot changes in your environment over time. Fine-tune readings with a calibration offset to match a reference microphone or a known sound source. Your calibration is saved between sessions.
BUILT FOR MUSICIANS

Whether you're checking rehearsal room levels, monitoring stage volume, verifying hearing-safe listening environments, or simply curious about the world around you — Decibel gives you the numbers you need, fast.
KEY FEATURES

Real-time dB SPL measurement
A, C, and Z weighting filters
Peak and average level display
Session recording with history graph
Calibration offset
Works fully offline — no account, no internet required
No ads, no subscriptions

PRIVACY

Decibel uses your device microphone only for real-time measurement. No audio is ever recorded, stored, or transmitted. Everything stays on your device.