I used my phone completed handsfree while driving but still they were not happy

I do a lot of presentations and sales. While driving I use the idle time to practice my speech and pitches. I record and listen back to my voice in a loop using an App called Repeat Recorder. It allows my to fully record and replay myself handsfree while driving.

I put my phone in a phone holder connected to the car window. Since the App loops between record and replaying handsfree, to stop it, I have to do just one tap (Since I don't want to record-replay my converation in front of the police).

Also, I only push the stop button in the App when the car is at full rest.

Why is the police still not happy with this?

Is a handsfree App still considered distracting the driver?

What about using google maps? Do people get caught as well?