TikTok's AI Content: QUICK EASY JOB

I need you to find what program they are using to generate the AI singing voices in the example video. I need you to find the EXACT app/ software used not something similar. I will only pay if you find the app. The example video: https://www.tiktok.com/@knowledgesir/video/7360976143694007585?_t=8lpVEWVNTd2&_r=1