Decibel: dB Sound Meter
Noise Exposure & Daily Dose
Free · In-App Purchases · Designed for iPad. Not verified for macOS.
Measure sound in real time, check daily noise exposure, save detailed records, and add live dB overlays to photos and videos for easy documentation.
Measure sound levels, understand noise exposure, and save clear records with Decibel: dB Sound Meter.
See real-time readings, follow changes on a live graph, and review average/Leq, minimum, maximum, and peak values during each session. Use the app for everyday sound checks at home, work, events, studios, and outdoor environments.
REAL-TIME SOUND MEASUREMENT
• Current sound level in a clear digital and analog display
• Live waveform graph
• Average/Leq, minimum, maximum, and peak values
• Fast response mode
• Calibration offset for supported microphones
• Reference labels that make sound levels easier to understand
NOISE EXPOSURE
• Estimated daily noise dose
• Time-weighted average (TWA)
• Projected dose and exposure details
• OSHA-based reference view
• Exposure-time guidance for different sound levels
RECORD AND DOCUMENT
• Save measurement sessions
• Add names and notes
• Review detailed session data
• Play back saved recordings
• Add live dB overlays to photos and videos
• Share saved results for personal documentation
USE DECIBEL FOR
• Workplace noise awareness
• Concerts, rehearsals, and event checks
• Home appliance and room comparisons
• Neighborhood and traffic noise records
• Baby rooms, study spaces, and quiet environments
PRO FEATURES
Upgrade to Pro to unlock:
• Unlimited saved history
• PDF report export
• Advanced noise analysis tools
• Extended calibration controls
• Ad-free measurement
IMPORTANT MEASUREMENT INFORMATION
Sound level readings depend on the device model, microphone, case, environment, calibration, and connected accessories. Decibel is designed for awareness, comparison, and personal documentation. It is not a certified sound level meter or noise dosimeter and is not a replacement for professional equipment. Do not use the app as the sole basis for workplace compliance, legal, medical, or safety decisions.
Note
If you subscribed through Apple, payment will be charged to your App Store account at confirmation of purchase. Subscriptions automatically renew unless auto-renewal is turned off at least 24 hours before the end of the current subscription period. Your account will be charged for renewal at the price of your chosen plan within 24 hours prior to the end of the current subscription period. You can manage your subscription and auto-renewal in your Account Settings after purchase.
Privacy Policy
Your data stays private—we don't collect personal info unnecessary for measurements. Microphone access is used solely for decibel tester functions, with no background tracking.
Privacy Policy:
https://asmyapp.com/decibelmeter/privacy
Terms of Use:
https://asmyapp.com/decibelmeter/terms
Questions or feedback:
support@mobiunityhk.com
Download Decibel: dB Sound Meter to measure, compare, and document everyday sound environments.
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Ratings & Reviews
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Known issue optimization fixes
The developer, 芳 王, 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 Linked to You
The following data may be collected but it is not linked to your identity:
- Location
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Provider
- HK MobiUnity Technology Limited
- Size
- 164.3 MB
- Category
- Lifestyle
- Compatibility
Requires iOS 15.0 or later.
- iPhone
Requires iOS 15.0 or later. - iPad
Requires iPadOS 15.0 or later. - iPod touch
Requires iOS 15.0 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
English and 17 more
- English, Arabic, Filipino, French, German, Indonesian, Italian, Japanese, Korean, Polish, Portuguese, Russian, Simplified Chinese, Spanish, Thai, Traditional Chinese, Turkish, Vietnamese
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Weekly VIP USD 11.99
- Weekly VIP USD 11.99
- Weekly VIP USD 11.99
- Weekly VIP USD 11.99
- Weekly VIP USD 11.99
- Copyright
- © 2026 HK MobiUnity
