Terms of Use

Last updated 1 October 2026

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1. Who we are
2. Agreeing to these terms
3. What the tools are, and aren’t
4. Your account
5. Trials, plans and payment
6. Your projects and files
7. AI features and outside data
8. Using the tools fairly
9. Our software
10. Changes and availability
11. Australian Consumer Law
12. Limits on our responsibility
13. Ending your account
14. Changes to these terms
15. Law and disputes
16. Contact

1. Who we are

One Engineering (“we”, “us”) is run by the business owner’s legal name (ABN ABN to be added). The service includes the One Engineering website and app and every tool in it, including Groundwork, AeroSim, HydroForge and any tools we add later.

2. Agreeing to these terms

By creating an account or using the tools, you agree to these terms and to our Privacy Policy. If you use the tools for a business, you confirm that you can agree on its behalf, and “you” includes that business.

You must be 18 or older, or have a parent or guardian’s permission and their agreement to these terms.

3. What the tools are, and aren’t

The tools help you understand a project, get preliminary estimates and prepare information for the professionals you work with. This includes the house checks, engineering briefs, plan and photo readers, design calculations, simulations and reports.

They are not professional engineering advice or certification

• Results are first checks based on the information you enter, the assumptions shown, and simplified methods drawn from published standards. They do not replace a design by a qualified engineer, an inspection, or approval from a building certifier, council or other authority.
• Using the tools does not make us your engineer or adviser, and no professional relationship is created.
• Before you rely on a result to build, buy, sell, approve, manufacture, fly or launch something, or for anything that affects safety, have it checked by a suitably qualified and, where required, registered professional.
• Results can be wrong if the inputs are wrong or incomplete, if site conditions differ from those assumed, or if a standard, rule or map has changed. Check the inputs, the assumptions and the version of each standard shown.
• Reports and briefs are marked as preliminary. Don’t remove those notes or present the work as certified.

4. Your account

• Give accurate details and keep your email address up to date, because we use it for sign-in, security and billing messages.
• Keep your password private. You’re responsible for what happens on your account, so tell us straight away if you think someone else has used it.
• Team plan owners decide who joins their team and can remove members. Projects saved to a team may be visible to its members.

5. Trials, plans and payment

• Free trial. New accounts get a free Pro trial for the period shown at sign-up, with no card needed. When it ends, the free features stay available, and paid features need a plan.
• Plans. Plans are priced per tool, billed monthly or yearly in advance. Prices are in Australian dollars and include GST where it applies. Our payment provider, Stripe, processes payments, and we never see or store your full card details.
• Automatic renewal. Plans renew automatically at the end of each period until you cancel. You can cancel any time in Settings. Your plan keeps working until the end of the period you’ve paid for, and then it stops.
• One-off reports. Without a trial or a plan, you can buy a single report for a fixed price, paid once: a whole house brief or site report, or one calculation report. It unlocks printing and downloading that report for that project for as long as your account exists. It doesn’t renew.
• Changing plans or seats. If you change plans or the number of seats part-way through a period, the difference is prorated on your next bill.
• Price changes. We’ll give you at least 30 days’ notice by email before a price change applies to your next renewal, so you can cancel first if you choose.
• Refunds. We don’t refund part-periods when you change your mind. That doesn’t limit any refund or other remedy you’re entitled to under the Australian Consumer Law, for example if a tool has a major failure.
• Student plans. Student plans are for study only and need a confirmed student email address. Work produced on one is marked as a student licence.
• Failed payments. If a payment fails and isn’t fixed, paid features may stop until it is.
• Invite a friend. A friend who signs up with your invite link gets a longer free trial. When they start a paid plan, you get a free month. If you have a paid plan, that’s a credit of one month’s price on your next bill; otherwise it’s extra days of the Pro trial. Rewards are limited to the number shown in Settings, have no cash value, and aren’t given for accounts you create for yourself. We may change or end the offer, but rewards you’ve already earned stay.

6. Your projects and files

• You own what you put in: projects, plans, photos, drawings, addresses and notes (“your content”).
• You give us permission to store, copy, process and display your content only as needed to run the tools for you, including sending it to the service providers listed in our Privacy Policy. This permission ends when your content is deleted.
• Only upload content you have the right to use. House plans and drawings are often protected by copyright held by the architect or designer.
• When you share a project or email a report, the people you send it to can see it. Share links work for anyone who has the link until you turn them off.
• Keep your own copies of anything important. You can download your data at any time in Settings.

7. AI features and outside data

• Some features use an AI service to read plans and photos or answer questions. AI can misread or make things up, so every value it fills in is marked with where it came from, and you should check it.
• Some tools look up maps, addresses, planning rules, hazard maps and weather data from outside sources. We don’t control those sources and can’t promise they are complete or current.

8. Using the tools fairly

Please don’t:

• break the law, or use the tools to mislead anyone, including by presenting results as certified engineering;
• try to get into other people’s accounts or projects, or test, probe or overload our systems;
• copy, resell or rebuild the tools, or scrape them automatically;
• share one person’s plan among several people, unless it’s a team plan with enough seats;
• upload anything harmful, such as malware, or other people’s personal information you have no reason to share.

9. Our software

We own the software, design, text and branding of the service, apart from your content. You may use the tools and anything they produce for you, such as reports, briefs, drawings and exported files, for your own projects and your clients’ projects.

10. Changes and availability

We’re always improving the tools, so features may change, move or be retired. We aim to keep the service running, but it may sometimes be unavailable for maintenance or because of problems outside our control. If we retire a paid tool, we’ll give you notice and a fair refund for any period you’ve paid for and can’t use.

11. Australian Consumer Law

Our services come with guarantees that cannot be excluded under the Australian Consumer Law. Nothing in these terms takes away rights you have under that law or other laws that can’t be excluded. Where the law allows, our responsibility for failing to meet a guarantee is limited to supplying the service again or paying the cost of having it supplied again.

12. Limits on our responsibility

To the extent the law allows, and subject to section 11:

• we provide the tools “as is”, and we don’t promise that results will be free of errors or suitable for a particular purpose;
• we’re not responsible for loss that comes from relying on a result without having it checked by a qualified professional, as section 3 requires;
• we’re not responsible for indirect or consequential loss, such as lost profits, lost opportunities or delays;
• our total responsibility to you for any claim is limited to the amount you paid us in the 12 months before the claim arose.

Nothing here limits responsibility that can’t legally be limited, including for fraud or for death or personal injury caused by negligence.

13. Ending your account

You can delete your account at any time in Settings. Deleting it cancels any paid plan and permanently removes your projects. We may suspend or close an account that seriously or repeatedly breaks these terms. Where it’s reasonable, we’ll warn you first and give you a chance to download your data.

14. Changes to these terms

We may update these terms as the service changes. For important changes, we’ll let you know by email or in the app before they apply, and we may ask you to agree again. The date at the top shows the current version.

15. Law and disputes

These terms are governed by the law of South Australia, Australia. If something goes wrong, please contact us first and we’ll try to fix it. If we can’t, the courts of that state have jurisdiction.

16. Contact

Questions about these terms: contact email to be added.