A session is the ordered story of every roll at the table, not just a final score. Each roll is saved to your account the instant you enter it, so the session is safe even if your phone dies — sign in on any device and it's there.
That detail is what makes everything else possible: hot and cold numbers, how often each total really came up versus the true odds, how long hands lasted, and your scores.
Every session belongs to an event (or a trip) — that's where the casino lives, and how sessions from the same night or trip roll up together.
Inside a session, each time the dice pass the new shooter starts a hand with its own rolls, point and seven-out. One person can have several hands as the dice come back around. Hands from the shooter tagged Me are yours: they feed your personal shooting stats and your CPL DICE score. Everyone else is tracked for the table picture.
Nothing is pre-calculated. Every stat and score is worked out fresh from your saved rolls and bankroll entries whenever you open a screen — so editing or deleting a roll, or filling in a missing bankroll, updates everything immediately.
DICE comes from the dice themselves. BANK comes only from bankroll entries — your starting bankroll plus an ending bankroll for each shooter — so if you never enter bankrolls there's nothing for BANK to build from. Full details in Understanding DICE & BANK Scores.