I'm wondering why anyone would need this tool 🤔, why the hell would people want to change their voice over the phone? Oh yeah some scammers have used this to fool people into thinking they are real female, some shits you can find through online romance scam, there are few cases like that where the real culprit is a man but change voice on phone as a woman
This service is not a real time voice. Its Just a recording so a scammer won't be able to answer the real time questions in female voice.
There are many voice over use cases as companies need good voices to advertise their brands. Also there are people offering this services on fiverr too.