Controversial but I wouldn't use photos/media at all. At least not as the "main" feature where the actual metric is user engagement, not outcomes. I've worked on a massive, successful dating app before, so I have a bunch of ideas. I also created an app 4-5 years ago but shelved it due to COVID lol.

The challenge is making money on outcomes. There's more money to be made in ongoing care than complete prevention, for example.