Noise Diary: dB Log
Measure, note and export noise
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
Measure a noise event and keep approximate Leq, maximum, minimum, tags, and notes on your device—without creating or uploading an audio recording.
Noise Diary is a focused tool for measuring environmental sound and saving the moment as a noise event.
What you can do:
- See an approximate dB(A) reading
- Start and end an event to save Leq, maximum, and minimum
- Add a tag and notes
- Review a local timeline
- Export CSV and PDF
- Apply local calibration using a reference sound level meter
- Continue only an event you started while the screen is locked or another app is open
Privacy first:
- Analysis runs on your device
- No audio recording is created
- Audio and measurements are not uploaded
- No background measurement outside an event you start
Important: Readings are approximate values calculated from the iPhone microphone. Noise Diary is not an IEC-compliant professional sound level meter. Do not use it for legal, health, hearing-safety, or workplace-compliance decisions.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The developer, 逸文 周, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- 逸文 周
- Size
- 1.9 MB
- Category
- Utilities
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
English and 2 more
- English, Japanese, Simplified Chinese
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Noise Diary Pro Lifetime $6.99
- Copyright
- © 2026 yiwen zhou