# Decibel - Sound level checker

> Utilities

Canonical page: [https://chrome-stats.com/d/id6775396227](https://chrome-stats.com/d/id6775396227)

## Overview

- **ID:** `id6775396227`
- **Platform:** Apple
- **Type:** Apple app
- **Status:** Available
- **Publisher:** ERIC ANDREE HULTGREN
- **Category:** Utilities
- **Version:** 1.0
- **Last updated:** 2026-06-04
- **First published:** 2026-06-04
- **Size:** 673 KB
- **Data as of:** 2026-09-23
- **Store listing:** [Apple App Store](https://apps.apple.com/us/app/decibel-sound-level-checker/id6775396227)
- **Website:** [https://decibel.hultan.com](https://decibel.hultan.com/)
- **Privacy policy:** [https://decibel.hultan.com/privacy](https://decibel.hultan.com/privacy)

## Description

A precise, restrained sound meter for the room you're in. Real-time levels, calibrated to your phone, on-device only - no audio is ever recorded.

Decibel turns your iPhone into an ambient sound-level meter — a precise, restrained instrument for understanding the noise around you.

THE READOUT
A single number, measured in real time and smoothed enough to actually read. The screen shifts colour with the level - green when quiet, amber at conversation, red when loud - so you feel the room before you read the value.

THE RECORDING
Tap the red button to start a measurement session. Decibel tracks the peak and average dB along with a live 15-second waveform. Tap again to stop, and the session is saved to your local history with its timestamp, duration, peak, and average - no audio is recorded, only the summary.

THE INSTRUMENT
- Two-tier smoothing - a fast filter drives the bar and the background tint, a slower one keeps the headline number stable
- Calibration sheet - tune Decibel against a reference meter you trust, so readings match on your specific device
- Live waveform during recording, showing variation at a glance
- Recording history persists across sessions; swipe to delete or clear all
- Custom typography, dark-only design, full-screen meter, no distractions

ON-DEVICE, ALWAYS
- Audio is processed in real time and immediately discarded — no audio is recorded, stored, or transmitted
- Only summary statistics from recording sessions are saved (start time, duration, peak dB, average dB), to your phone's local storage
- No analytics, no tracking, no accounts, no advertising, no network requests
- No third-party SDKs

ON ACCURACY
iPhone microphones are not laboratory-calibrated, so the values shown are estimates. Treat them as a relative measure - how loud one environment is compared to another - not as certified sound-pressure measurements.

Decibel is not suitable for hearing-safety decisions, OSHA or NIOSH compliance, medical assessment, or any purpose where measurement accuracy matters. For those, use a certified Type 1 or Type 2 sound-level meter. The Calibration sheet improves the relative accuracy of readings on your device but does not turn the app into a certified instrument.

## Rankings

- #2,286,314 — Overall

## Similar extensions and apps

- [Decibel Meter: Sound Level dB](https://chrome-stats.com/d/id6766639466)
- [dB Sound Level Meter & Noise](https://chrome-stats.com/d/id6781215060)
- [Decibel Meter - Noise dB Level](https://chrome-stats.com/d/id6756323914)
- [dBing: Decibel Sound Meter](https://chrome-stats.com/d/id6780222792)
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- [Decibel Meter: dB Sound](https://chrome-stats.com/d/id6765924035)
- [Decibel Meter - Sound Meter](https://chrome-stats.com/d/id1373636871) — 4.30 / 5
- [Sound Meter - Decibel](https://chrome-stats.com/d/id6761742597)
- [Decibel Meter - Sound Level](https://chrome-stats.com/d/id6741395557)
- [SoundMeter: Decibel dB](https://chrome-stats.com/d/id6772828581)
- [Decibel Meter: Noise Recorder](https://chrome-stats.com/d/id6759807523)
- [SoundMeter - Decibel dB Level](https://chrome-stats.com/d/id6777496612)

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Source: [Chrome-Stats](https://chrome-stats.com/d/id6775396227)