Put on headphones, and turn on Smart Voice Recorder, then set a delay for your desired effect. Speech Jammer is a passthrough audio tool that will allow you to send audio from any input and send it automatically to an output either with no delay, or a delay depending on what your expected results are.
There is no preset delay or preset effects. You pick what effect you want to cause!
The app works best with noise cancelling headphones, and headphones with the microphone built-in. If you cannot get proper results, try adjusting the slider