Preta: BJJ Social Network

Preta is a social network for people who train Brazilian Jiu-Jitsu. Not a fitness app with a BJJ sticker on it — a place built around how this sport actually works: you show up, you train, you get a little better, and the people you roll with become your people. Open the app and it asks one question: "Train today?" One tap logs your session. That's it. Your streak, your session count, and your private notes build up quietly in the background — a training log that's yours alone, not content for an audience. Your belt is the spine of your profile. Track every stripe and every promotion, from day one at white belt to wherever you end up. It's private by default — show your journey on your profile if you want, or keep it between you and your professor. Post your rolls. Tag the people you actually trained with — posts here say "rolled with," because that matters more than who liked what.…