Why is this not working? – SaveTok Review

I seriously downloaded then took out then re-downloaded it like 50 times and it’s still not working the way it’s supposed. I have an iPhone and it doesn’t download the tiktok or “process” the tiktok to take the watermarks off at all. It just freezes every single time. Then it just takes me back to tiktok, nothing was processed at all!
Review by google V on SaveTok.