Terribly inaccurate
It couldn’t even latch onto an A440 pitch pipe.
Terrible
As a singer testing this out it is extremely off. Doing a low b flat 4 it was going to the 300s when it should only be at about 74 in Hz.

Archived App
This is an archived listing of the app previously available on the App Store.This utility app measures sound volume in decibels and frequency in Hertz. It offers continuous data display, audio file recording and playback, and simple statistics for maximum, minimum, and average values. The interface is designed for ease of use.
1.2.0
March 2, 2023
1. General bug fixes 2. Stats Records
Sound Detector is a utility app designed to measure sound volume in decibels (dB) and frequency in Hertz (Hz). It provides continuous data and allows users to record and replay audio files.
No, Sound Detector is a completely free application without any advertisements. The developer has indicated it is ad-free.
Sound Detector offers simple statistics for sound measurements, including the maximum, minimum, and average decibel and frequency values detected.
Yes, users can record audio files and share them with others. The app also supports replaying these recorded sound files without limitation.
Sound Detector is compatible with iPhone, iPad, and iPod devices. It is fully Retina-compatible with all screen sizes.
The latest version of Sound Detector is 1.2.0, which was last updated on March 2, 2023. This indicates a relatively infrequent update cycle.
Sound Detector has an age rating of 4+, making it suitable for young children and general audiences.
Sound Detector has a rating of 3.0 stars from 5 ratings. Users are encouraged to leave reviews and feedback to help improve the application.