Qr reader vs Decibel：db Sound Meter

Generate QR code: Generate QR codes for different types of content, such as email, messaging, YouTube, Twitter, Instagram links. Scan QR code: You can scan the QR code in the album or use a camera to scan the QR code. Custom color: Abandoning black and white QR codes, different colors and background colors can be set for the QR code. Automatic Renewal Service Statement Payment: After the user confirms the purchase and makes the payment, the amount will be credited to their iTunes account. Unsubscribe: To unsubscribe, please manually disable the auto renewal feature in iTunes/Apple ID settings management 24 hours before the current subscription period expires. After cancellation, no further fees will be charged. Renewal: Apple iTunes account will be charged within 24 hours before expiration. After successful deduction, the subscription period will be extended by one subscription period. Privacy Policy: https://docs.qq.com/doc/DVHZTYVhrTmJFWGlR Terms of Use: https://docs.qq.com/doc/DVG9WU3VobU1yRWFU

This is an efficient and practical noise measurement tool that allows you to accurately measure noise anytime, anywhere. It provides recording, photography, and video recording to help you easily manage noise. [Function Introduction] Professional decibel monitoring: Dynamic real-time monitoring of decibel data. Photo recording data: Decibel watermark shooting recording data Real time video recording: detecting decibel changes at each time interval Monitoring Record Report: Downloadable Decibel Detection Record Form Decibel monitoring record: Detailed record of the detection data at that time 1.Payment: The user deducts the payment through their iTunes account and makes the payment upon confirmation of the purchase 2.Renewal: The user's iTunes account will be charged within 24 hours before expiration, increasing the corresponding subscription period 3.Cancel Renewal: To cancel the renewal, go to "iTunes Store and App Store" ->click on "App ID", enter the "Account Settings" page, click on "Subscription", and select "Cancel Subscription" 4.Privacy Policy: https://docs.qq.com/doc/DRkdDZUVKdUpMR1da 5.Terms of Use: https://docs.qq.com/doc/DRktSRXB2TnlqYlBY