We store the minimum needed: a StatForge user id, your Wargaming account id and nickname, an encrypted short-lived access token, a cache of your latest per-vehicle counters, and, for accounts you linked yourself, a sparse history of those counters (one row per vehicle per day it was played) kept for 12 months so we can show recent form. All of it is deleted when you unlink or delete your account. Public player lookups are never stored. We do not request your Wargaming e-mail or password. We do not sell data and we do not run advertising.