Noise Recorder
Track ambient noise patterns
Free · Designed for iPad. Not verified for macOS.
Record ambient noise and find your own patterns. A personal monitoring tool — no signup, all data stays on your device.
Record the noise around you and discover your own sound patterns.
Noise Recorder is a personal monitoring tool. It measures ambient noise as a decibel (dB) reading, records audio in segments, and helps you see when your environment is quiet, noisy, or somewhere in between. The goal is to help you understand your own surroundings — not to produce evidence or resolve disputes.
No signup, no login, no cloud account. All recordings and statistics stay on your device.
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Features
Real-time decibel reading
Live dB number plus a scrolling waveform from your microphone. Color-coded levels show quiet, normal, and loud zones at a glance.
Automatic segmented recording
Recording is split into segments of a length you choose. Segments where every sample stayed below your dB threshold are deleted automatically to save space.
Noise event detection
The app watches your background noise level and flags sudden spikes. Each spike keeps a 5-second context window of audio so you can listen back and understand what happened.
Tags and notes
Tag each event with one of the seven built-in sound types (footsteps, thump, construction, water, music or TV, pet, other) or your own custom tags. You can attach an optional reference photo too.
Hourly statistics
See a 24-hour bar chart of when noise tends to happen and a "quiet time vs noisy time" summary, all derived from your local data.
Export
Export filtered records as PDF, Excel, or ZIP. You can apply a minimum dB threshold and exclude tags you do not want included.
Localization
English and Korean. Switch from Settings — change applies immediately, no restart.
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What this app is and is not
This app is a personal tool for understanding your own ambient noise. It is not designed to produce official records, evidence, surveillance footage, or material for legal disputes. The numbers and recordings are for your own reference.
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Data and permissions
All recordings, photos, and statistics are stored only in on-device storage (Hive and SharedPreferences). Nothing is uploaded to a server we control. The microphone permission is required to measure and record. Camera and photo permissions are only used when you choose to attach a reference photo or share an export.
Ads are served by Google AdMob. Personalized vs non-personalized ads depend on your iOS App Tracking Transparency (ATT) choice.
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Contact
Questions or feedback: siwooeo@gmail.com
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Improved localization on statistics and recording screens (count units cleaned up).
The developer, SiU Ahn, 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 Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Identifiers
- Usage Data
- Diagnostics
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Identifiers
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- SiU Ahn
- Size
- 42.5 MB
- Category
- Utilities
- Compatibility
Requires iOS 13.0 or later.
- iPhone
Requires iOS 13.0 or later. - iPad
Requires iPadOS 13.0 or later. - iPod touch
Requires iOS 13.0 or later. - Mac
Requires macOS 11.0 or later and a Mac with Apple M1 chip or later.
- iPhone
- Languages
- English and Korean
- Age Rating
4+
- 4+
- Contains
Advertising
- Copyright
- © 2026 SiU Ahn