Terms of Use

Last updated: 2026-11-11

Education only — not financial advice

BOS is a game for practising chart reading on historical prices. Nothing in the app or on this site is financial, investment or trading advice. Past price moves do not predict future ones. Trading involves risk of loss; never trade money you cannot afford to lose.

Free trial and subscriptions

• New users get a 2-day free trial with a daily question limit. No payment details are needed.
• After the trial, playing requires a subscription (Basic or Pro, monthly or yearly), bought through the App Store or Google Play.
• Subscriptions renew automatically until you cancel in your store account settings, at least 24 hours before the end of the current period.
• Refunds are handled by Apple or Google under their rules.

Fair play

Don't use bots, multiple accounts or other tricks to change your rating or the ranking. We may reset ratings or remove accounts that do.

Content

Charts are based on real historical market data. Explanations are written with the help of AI and reviewed by us; they may contain mistakes.

Changes and contact

We may update these terms; the date above will change. Questions: support@example.com