Terms of Service

1. You sign in with an emailed link instead of a password. Keep access to that inbox secure: anyone who can read it can sign in as you. We aren't liable for loss or damage from someone else using your sign-in.
2. A license is for the number of people it says. A Personal license is for one person. A Team license (and the Team beta) covers up to 8 named people, each signing in with their own email. Don't share a sign-in between people, and don't resell or sublicense access.
3. What a plan includes, and for how long, is described on the page where you buy it. That description is part of these Terms.
4. You must be at least 13 years old, and a human. Accounts created by bots aren't allowed.
5. You're responsible for everything done under your license, including by the teammates you add.

Use the Services for designing, learning and analysis. Don't:

• copy, reverse engineer or try to extract the parts of the Services that run on our server, or work around sign-in, seat limits, rate limits or other access controls;
• use automated tools to send large numbers of requests or to scrape the Services;
• use the Services for anything illegal, or to harm the Services or other people using them.

We may suspend or end access for anyone who breaks these rules, and we may refuse service to anyone for any lawful reason.

The Workbench is a design aid. It does not certify, approve or guarantee any design, part or vehicle.

• Its results are only as good as the inputs you give it, and they rely on simplifying assumptions (rigid links, for example) that a real car doesn't always meet. The guide's "What the solver does not do" section lists them.
• Rule checks are a convenience, not an official interpretation. Your competition's rules, officials and technical inspection decide what is legal.
• Before you build, drive or test anything, check the results with your own engineering judgment, analysis and physical testing, and with a qualified engineer where your team, school or competition requires one.
• You, and not Sunfish Labs, are responsible for the design, manufacture, inspection, testing and safe use of any vehicle or part, including the safety of drivers, crew and anyone else nearby.

1. Purchases are processed by Lemon Squeezy, our reseller and merchant of record. It charges your card, collects and pays sales tax and VAT where they apply, and sends your receipt. Its buyer terms apply to the payment itself. We never see your card details.
2. Prices are shown before you pay. Taxes are added at checkout where the law requires them.
3. We handle refunds under our Refund policy. When an order is refunded, access from that order ends.

1. We improve the Services often, and sometimes we change or remove a feature. We may modify or discontinue any part of the Services, temporarily or permanently, with or without notice.
2. We may change prices for future purchases. A change never affects an order you've already paid for.

1. Your use of the Services is at your own risk. We provide them "as is" and "as available", without a service level agreement, though we take uptime seriously.
2. Your design files stay on your computer. Some calculations run on our server: the numbers they need are sent over an encrypted connection, used to work out the answer and not stored.
3. We process personal information only as described in our Privacy policy.
4. We use outside providers to run the Services (hosting, sign-in, payments, email and analytics). They're listed in the Privacy policy.

1. Your designs and the files you export are yours. We claim no ownership of them, and we only process what the Services need to give you an answer.
2. Sunfish Labs LLC and its licensors own the Services, including the software, the solver, the example and challenge cars, the guide and the site's design. Using the Services gives you no ownership in them. Don't copy, reproduce, resell or reuse any part of them, or use our names and logos, without our written permission.
3. If you send us feedback or answer a beta form, we may use it to improve the Services without owing you anything. We'll only quote you or name your team publicly with your permission.

We design the Services with care and check the solver against hand calculations and independent references on every release. Even so, no software is free of errors, and we don't promise that the Services will meet your specific needs or be error-free. We track the bugs reported to us and fix the important ones first.

We mention liability throughout these Terms, but to put it all in one place:

To the fullest extent the law allows, the Services are provided without warranties of any kind, express or implied, including warranties of merchantability, fitness for a particular purpose, accuracy and non-infringement.

You expressly understand and agree that Sunfish Labs LLC shall not be liable, in law or in equity, to you or to any third party for any direct, indirect, incidental, special, consequential, punitive or exemplary damages, including loss of profits, goodwill, use, data or other intangible losses, and including property damage or personal injury arising from a vehicle or part designed, built, tested or used with the help of the Services (even if we have been advised of the possibility of such damages), resulting from: (i) the use of or the inability to use the Services; (ii) any error or inaccuracy in the Services or their results; (iii) unauthorized access to or alteration of your data; (iv) statements or conduct of any third party; or (v) any other matter relating to these Terms or the Services, whether as a breach of contract, tort (including negligence), or any other theory of liability.

If, despite this, Sunfish Labs LLC is found liable, its total liability to you for all claims is limited to the amount you paid us for the Services in the 12 months before the claim arose.

Some places don't allow some of these exclusions or limits. Where that's the case, they apply as far as the law there allows, and nothing in these Terms limits rights you have under consumer law that can't be waived.

You agree to defend and hold Sunfish Labs LLC harmless from claims by third parties arising from a vehicle or part you design, build, test or use, or from your breach of these Terms.

We may update these Terms. When we make a significant change, we'll update the date at the top of this page and, for changes that affect paid licenses, email the address on the order. Using the Services after a change means you accept the updated Terms. If we don't enforce a provision at some point, that doesn't waive it.

These Terms are governed by the laws of the State of Missouri, USA, without regard to its conflict-of-law rules, except where the law of the country you live in requires otherwise.