Use APKPure App
Get simple frequency generator old version APK for Android
Specify a Frequency, Play the corresponding tone, See the waveform
This application allows you to select a frequency, volume and waveform and play the corresponding tone. You can choose between four different types of waveforms: a sine wave, a square wave, a sigsaw wave and a triangular wave. The application also includes a real-time oscilloscope that visualises the generated waveform.