Isn't that what the SavedModel is that they shared on googleapis.com right here? https://storage.googleapis.com/private_detector/private_dete...
edit: and for the record if your messages on a dating app are not E2E encrypted then you are making a terrible mistake. I can't believe anyone would voluntarily make this decision.
Reality goes something like this: You roll out your E2EE dating app, it gets successful, you're winning bigly. Then cops show up with an order from a judge demanding you hand over information regarding user #890202 because they are suspected of using your platform to entice minors into sexual activity. This is usually where the E2EE worship falls flat, for legitimate societal reason.
If you want E2EE you need to use a dedicated app specifically ONLY for that (Signal, WhatsApp, etc). Any time you bolt on other business or incentives and then use E2EE as the messaging platform you will discover a world of pain in my opinion.
Not that the issue of minors isn't a problem but I don't think that should always override people's privacy. And FWIW there is plenty of space for people to share compromising messages on the dating app before they can manage to convince a stranger to download Signal and continue the conversation there. That's if you're lucky enough that she doesn't immediately think you are a scammer of some kind.
I am on the side of privacy extremists but a lot of people find that to be a nonstarter so to each their own. I wouldn't dare go on a dating app that didn't have E2EE though or at least a way to anonymize yourself so no phone # required. ;)