That's so strange considering that all of them are owned by the same company. If anything, check the the Tinder and OKC subreddits. They more or less glaze over how the algorithms work there. And someone asked the same question in the Dating-Age thread regarding the confirmation code. It sounds like it's a new thing because whenever I reboot my account, it's never asked for anything.
Ladies love animal pics so borrow a bodega cat or a friend's pet and take a selfie with it. The aforementioned Tinder subreddit is a pretty solid community. If ladies see the tats, they're going to love it. OKC would also be a safe bet to cover you bases.
Funny enough, yesterday was the busiest day of the year for dating apps according to
a couple of articles I just read. The articles that I linked mention that dating apps are starting to become increasingly more niche and tailor to specific interests e,g, bacon lovers, gym rats, but of course the downside is that they don't have the bells and whistles of the bigger dating apps nor the install base. One of the articles mentioned Sapio which is an app for sapiosexuals, another one mentioned Whim, and the last link mentioned Greenlight. Here's a quote from each of the linked articles on the current state of dating apps:
Kyne and Kyled05's break ups might be attributed to being a case of new year, new changes. I do agree that people are going on too many first dates and not enough second or third dates myself included.
That being said to answer your question, I have OKC, Tinder, Bumble, CMB, and Feeld installed on my phone but I'm only semi-active on OKC and Tinder to a lesser extent. I had Hapn installed on my phone at some point but never got anything. There's a couple that met via Hapn that one of the articles mentioned so I'll give it another shot. I'm not super active on dating since I'm trying to get my goals organized.