# Decibel Meter: NoiseScope — Noise, sleep & sound reports

> Noise, sleep & sound reports (iPhone/iPad app by 博 彭.)

- Source: https://appshunter.io/ios/app/decibel-meter-noisescope/id6760281155 (this page in markdown: same URL + `.md`)
- Developer: [博 彭](https://appshunter.io/developer/1293268076)
- Category: Utilities
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 17.0 · 3 MB
- Languages: Chinese (Simplified, China)
- Released: 2026-03-12
- Data updated: 2026-09-08
- User reviews in markdown: https://appshunter.io/ios/app/decibel-meter-noisescope/id6760281155/reviews.md

## What is Decibel Meter?

NoiseScope is a personal environmental noise analyzer for
  real-time sound measurement, sleep environment review,
  and long-term noise records.

  Open the app and measurement starts automatically. You
  can check current dB levels, peaks, LAeq trends,
  weighting modes, response modes, low-frequency
  indicators, and noise profile insights in a focused full-
  screen interface.

  Key features:

  - Real-time decibel measurement
  - LAeq, peak, A/C/Z weighting, and Fast/Slow/Impulse
    response
  - Sleep noise analysis with baseline, peak, disturbances,
    and quiet periods
  - Hearing exposure estimates based on NIOSH and OSHA
    references
  - Noise profile insights for low-frequency rumble,
    traffic, mechanical noise, and sudden events
  - Local history with session summaries and event
    timelines
  - PDF reports for single sessions, 24-hour trends, and
    sleep review
  - Microphone profiles, calibration tools, and device
    model adjustment
  - Local-first data storage with no raw recording upload
    by default

  Free features include real-time measurement, basic
  trends, single-session reports, and recent history. Pro
  is a one-time purchase that unlocks advanced reports,
  sleep analysis, full history, calibration tools, alerts,
  and data archive features.

  NoiseScope is designed for personal reference, room
  comparison, sleep environment review, apartment noise
  checks, office noise tracking, and daily sound awareness.
  It is not a replacement for a certified legal sound level
  meter.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Pro永久版 | $1.99 | one-time |



## Version history (last 3 releases)

### 1.0.2 — 2026-05-21

Version 1.0.2 improves the launch and release experience:
- Opens directly to the main app interface
- Adds a contact email in Settings for feedback and suggestions
- Adds a continuous-improvement note for measurement, device support, reports, and sleep analysis
- Refines localized copy and version display

### 1.0.1 — 2026-05-20

1. Measurement now starts automatically when the app
  launches, with no need to tap the start button.
  2. Improved the main measurement screen so real-time
  noise data is available immediately.
  3. Refined the startup flow for automatic and live
  microphone modes for a smoother experience.

### 1.0 — 2026-03-12

No release notes.

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## More apps by 博 彭

- [Visual Periodic Table Chemie](https://appshunter.io/ios/app/visual-periodic-table-chemie/id1661609052)
- [Morse Code Master](https://appshunter.io/ios/app/morse-code-master/id1663425426)
- [Super offline encryptor](https://appshunter.io/ios/app/super-offline-encryptor/id1663705723)
- [Chip Simulator](https://appshunter.io/ios/app/chip-simulator/id1665510956)
- [Audio Visualize](https://appshunter.io/ios/app/audio-visualize/id1665811859)
- [学车模拟器](https://appshunter.io/ios/app/id1668569495)

All apps by 博 彭: https://appshunter.io/developer/1293268076

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-08.*