I just tested the app in French with emotion. It seems accurate, but some sounds are poorly pronounced, especially older words or words like 'n'est' where the pronunciation seems split. Trying to understand the app, your paragraph separation isn't effective, and sentence separation isn't either. Several tests were needed, and the voice must be changed for each line as there's no default option (I couldn't find it). While trying to use your IPA for a word, I couldn't apply it in a sentence, and now we're at the end of the free trial and need to upgrade. If we can't test properly in our native language and perfect pronunciation, nor understand your system for perfect results, it will be hard to attract clients with higher standards. Best regards