Terms of use

Who we are

Tradeoff Gym is a system design practice site and Android app run by an individual in Ireland. By using it you agree to these terms.

Your account

You can use the free content without an account. Signing in uses your GitHub account; keep it secure, because anyone who can sign in to it can use your Tradeoff Gym account and progress.

Free and Pro

Phases 00–03 and the other free practice stay free. Pro adds the content and features listed on the Pro page. Pro is a one-time purchase for your own personal use: it isn't a subscription, and it can't be shared, resold or transferred to another account. We may add to Pro over time; we won't take away a feature you paid for without offering a refund.

Fair use

Don't copy, scrape or republish the content, try to get around the Pro lock, overload the service, or use it to break the law. We may suspend accounts that do.

Content

The explanations, drills and builds are written for Tradeoff Gym and remain ours. They teach general engineering practice; they aren't professional advice for your specific systems, so check decisions that matter with your own team.

Availability

We aim to keep the site and app running, but can't promise they will always be available or free of mistakes. Nothing in these terms limits rights you have under Irish or EU consumer law.

Refunds

See the refund policy.

Changes and law

If these terms change, the date above changes too; continuing to use Tradeoff Gym after that means you accept the new version. These terms are governed by the laws of Ireland.