FIrst a disclaimer - i am not associated in any way with the app i want to recommend, just a fellow 'parkie' looking for an app to help/complement my speech therapy.
I was looking for something comparative with my speech therapy ( long vowels, functional terms, reading, improvized speech analysis...) and found "Loud & Clear" to be helpful.
There are probably other, maybe even better voice analysis products out there, but this one is created specifically for PWP and it is free. You can't beat that. You can find it here - loudandclear.io/
Hope you find it useful.