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.