Terms of Service

By creating an account, buying access or using ArcLab, you agree to these terms. If you don’t agree, please don’t use the service.

ArcLab is an online step-by-step system of written, interactive modules with production scenarios, frameworks, build tasks where you write specs for your own projects, and quizzes. Paid access includes every module in your workspace, including the Build & Ship bonus track. Some modules open only after you finish earlier ones; your workspace shows the current order.

Access is a one-time payment, not a subscription. The first 100 founding members pay $29; after that the price is $49. Lemon Squeezy processes every payment as Merchant of Record and handles sales tax and receipts.

Refunds follow our refund policy.

Your purchase gives you access to every current module and every module we add later, for as long as ArcLab operates, at no extra cost.

• Access is personal. Don’t share your account or sign-in details.
• Keep your sign-in method secure, and tell us if you think someone else has used your account.
• We may suspend accounts used to abuse the service, attack it, or redistribute the modules.

The modules, text, illustrations and other materials belong to ArcLab. You may use them for your own learning and work, but you may not resell, republish or redistribute them. The specs and notes you write are yours.

ArcLab is provided “as is”. The modules teach engineering practice; they aren’t professional advice for any specific system. To the extent the law allows, ArcLab isn’t liable for indirect or consequential losses arising from your use of the service.

If we change these terms in a way that matters, we’ll update the date at the top and email paying members before the change takes effect.