Decibel — Sound Meter

Three seconds. One phone. Loudest wins. Pass Decibel around, scream your lungs out, and let the microphone settle it. A beautiful sound meter when the room calms down.

WHO'S THE LOUDEST?

Three seconds.

That's your turn.

Pass the phone, hit go, and make as much noise as humanly possible. Decibel watches the live microphone level, catches your peak, and puts your score on the board.

Then hand it to the next person.

Highest number wins.

That's Scream Contest: a beautifully serious sound meter being used for something profoundly unserious.

Birthdays. Parties. Road trips. Family dinners that were apparently too peaceful.

PASS. SCREAM. SCORE.

• One iPhone
• Three seconds per player
• Live reacting sound dial
• Peak score for every turn
• Loudest player wins

Scream Contest is included with the one-time Lifetime Unlock.

WHEN THE ROOM CALMS DOWN Decibel is also a genuinely useful live sound meter. Open it and the analog dial comes alive with the sound around you. See the current level, follow the average, catch the peak, and get context for what the number actually means. Library quiet. Conversation. Traffic. Concert. Now "that's loud" has a number.

THE SOUND METER — FREE, FOREVER

• Beautiful live analog dial
• Current, minimum, average and peak readings
• Sound-level context from quiet rooms to very loud environments
• Your 10 newest measurement sessions
• Everything stored locally on your device

UNLOCK EVERYTHING — ONCE

• Scream Contest
• Unlimited measurement history
• CSV export
• Gold, Ice and Lava dial themes

One purchase. No subscription.

WE MEASURE SOUND. WE DON'T LISTEN. Decibel processes microphone levels in real time. Audio is never recorded or stored.

An iPhone microphone is not laboratory equipment, so Decibel provides estimated sound levels rather than pretending to be a certified professional meter. It is not intended for medical, occupational-safety, legal or laboratory measurements.

No account. No ads. No subscription. No audio recordings. No data collection.

Just one phone, one microphone, and a very important question:

WHO'S THE LOUDEST?