Doesn’t work
The app wave form just jumped all over the place can’t detect a single frequency
Sound Analysis Oscilloscope
This app is terrible. I agree with the previous review. Don’t buy it.
...
Waste of money

This utility displays audio signal properties like frequency, waveform, and wavelength. It also identifies music notes corresponding to detected frequencies and includes a chromatic tuner. The app offers four frequency range modes and can be paused with a single tap.
1.2
November 6, 2018
Fix of the occasional app stop while changing the ranges.
Sound Analysis Oscilloscope displays waveform, wavelength, volume, and main frequency. It also detects music notes corresponding to frequencies and includes a chromatic tuner. The app supports four frequency range modes from 6 to 2000 Hz.
Sound Analysis Oscilloscope is compatible with iPhone, iPad, and iPod devices.
Sound Analysis Oscilloscope is a paid application with a price of $2.99.
Sound Analysis Oscilloscope has an age rating of 4+, making it suitable for a wide range of users.
The latest version of Sound Analysis Oscilloscope was released on November 6, 2018, with version 1.2.
No, Sound Analysis Oscilloscope does not contain advertisements.
Based on 3 ratings, Sound Analysis Oscilloscope has an average rating of 1.7 stars.
The description does not specify offline functionality, but its core features like microphone input and signal analysis would likely require active use of device hardware.