DecibelMeter-High measure db 4+

Noise hazard: A type of sound that causes irritability or is too loud and harmful to human health.
Noise not only affects hearing, but also adversely affects people's cardiovascular, nervous and endocrine systems, so some people call noise "a chronic poison that kills people."

Product Features:
- Professional decibel tester: high detection accuracy, easy to use, anytime and anywhere can be measured.
- Decibel test record: the test results are stored persistently and can be viewed at any time.
- Altitudinal meter: real-time measurement of the altitude, atmospheric pressure, azimuth, longitude and latitude of the current position.
[Description of Automatic Subscription Service]
1, Subscription price: monthly subscription, $8.99/month,
2. Payment: After the user confirms the purchase and makes the payment, it will be credited to the iTunes account
3. Apple iTunes account will deduct the fee within 24 hours before expiration, and the subscription period will be extended by one subscription period after successful deduction
4. If you want to cancel the subscription, please open the "Settings" of the iPhone --> enter the "iTunes Store and App Store" --> click "Apple ID", select" View Apple ID", enter the "Account Settings" page, click "Subscribe", select the AppVIP to cancel the subscription. This subscription will be automatically renewed if it is not closed at least 24 hours before the end of the subscription period
5, service agreements: https://docs.qq.com/doc/DSkFvbmpLQlBJRE1N
6, privacy agreement: https://docs.qq.com/doc/DSlF2Wm1ad0V3eHdz