Size Down — last updated September 5, 2026
Size Down is a trading journal. Here is exactly what it stores, where, and how to remove it.
Size Down creates an anonymous account on your device the first time you open it. There is no email or password. The account is tied to that browser or app install.
The trades you type in (symbol, side, size, result, fees, setup, feeling, plan-followed, rules broken, notes), your rules, your prop-firm eval definitions, your daily plans, reviews and grades. This is stored on our servers (Supabase, hosted Postgres in the United States) under your anonymous account, protected by row-level security so only your account can read it. We do not connect to your broker and never see your login, positions or balances.
Pro is sold through Stripe. Stripe collects your card and email; we receive a payment confirmation with your anonymous account id, the plan, and the email you used, so we can unlock Pro and help you restore it. We never see card numbers.
No advertising, no selling or sharing your data, no tracking across apps or sites, no reading your journal except to resolve a support request you send us.
Me → “Delete my account and data” removes everything immediately. Stripe keeps payment records as required by law.
Size Down records your own decisions. It is not financial, investment or tax advice, and it does not execute trades.