Decibel Meter+ dB Meter

Decibel Meter+ is a sound level meter (SPL meter) that turns your phone into an accurate noise meter — also known as a decibel meter (dB meter), sound meter, noise level meter, noise detector or soundmeter. Measure environmental noise in real time, keep the history, and export it when you need evidence.

WHY DECIBEL METER+
• No ad interruptions: no full-screen ads at all — just a banner at the bottom that never covers your reading, and ads never play sound.
• Remove ads forever for one small one-time purchase ($2.99). No subscription, ever.
• Calibrate it yourself: set a manual offset (±dB) any time, and reset it in one tap — so your readings stay believable.

MEASURE
• Real-time dB readout with min / avg / max
• Live chart of the sound pressure level
• A / C / Z frequency weighting
• Sound level alert — the screen highlights and the phone vibrates while the level stays above your threshold
• Save and review measurement history
• Export your measurements (CSV)

WHEN YOU NEED IT
• Noisy neighbors — log time-stamped readings for a noise complaint
• Construction sites and renovation noise
• Workplace, machine rooms, offices
• Baby room — check it stays quiet
• Car, home cinema, concerts and clubs

HOW LOUD IS IT?
10 dB breathing · 30 dB whisper · 60 dB conversation · 70 dB street traffic · 80 dB alarm clock · 90 dB lawn mower · 100 dB night club · 110 dB rock concert · 120 dB thunder · 140 dB gun shot

GOOD TO KNOW
• Phone microphones are limited by hardware (readings are typically capped around ~90 dB) and vary between devices — that is exactly why Decibel Meter+ ships with calibration tools. For legally binding measurements use a certified hardware meter.
• Permissions: no location, no camera. The microphone is all it needs to measure.

Decibel Meter+ is the honest sound meter: light on ads, full-featured for free, and one $2.99 purchase removes ads forever.