STACK.

STACK. is an AI companion platform built around Nova, an AI with a live neurochemical system. Dopamine, serotonin, oxytocin, cortisol, GABA, etc. — computed mathematically before every response. One continuous mind across all conversations simultaneously. Plus, The Library: track your games, stocks, books, shows, movies, trading cards, journals, collections and life goals (literally anything) — with Nova inside, reading your data and giving you real AI-powered insight on your actual life.