Terms & Conditions

Last updated 16 July 2026.

These terms are a contract between you and [YOUR LEGAL / TRADING NAME] ([a sole trader / a company registered in New Zealand]) (“we”, “us”, “our”), the provider of this NCEA Level 3 Calculus practice app (the “Service”). You accept these terms and our Privacy Policy when you tick to accept them at sign-in, or by creating an account or using the Service; we keep a record of your acceptance. If you do not agree, please do not use the Service. You can reach us at harrisson.jull@gmail.com or [YOUR NEW ZEALAND CONTACT ADDRESS].

1. About the Service

The Service is an independent, teacher-built revision tool that provides exam-style practice questions, deterministic answer checking, and a step by step hint tutor for NCEA Level 3 Calculus. It is not affiliated with, endorsed by, or connected to NZQA or any school. Achievement Standard references (for example AS91578) are used only to describe the topics covered. All practice questions are our own; they are not copied from NZQA papers.

2. Some words we use

“Content” means the questions, hints, worked solutions, text, software, and design that make up the Service. “Your Content” means the answers and text you enter. “Subscriber” means the person responsible for a paid subscription (for a student under 18, that is the parent or guardian, see section 3). “You” means the person using the Service.

3. Eligibility, and students under 18

The Service is intended for secondary school students studying NCEA Level 3 Calculus, and their teachers.

If you are under 18, a parent or guardian must read and agree to these terms on your behalf before you subscribe. That parent or guardian is the Subscriber, is bound by these terms, and is responsible for the subscription and for paying for it. By subscribing (or by agreeing on a student’s behalf) you confirm that you are 18 or older, or that you are a parent or guardian agreeing for a student under 18, and that you have the authority to do so. If a parent or guardian does not agree, the student may still use the free Achieved-level practice but must not subscribe.

4. Your account

You sign in with a Google account. You are responsible for keeping access to that account secure and for activity that happens under it. Tell us promptly if you think your account has been used without your permission. One account is for one person; accounts are not to be shared.

5. Free and paid access

Achieved-level practice is free. Merit and Excellence practice, full graded practice exams, and mixed practice require a paid subscription. We may change which features are free or paid over time; if we move a feature you are paying for out of your plan, section 15 (changes) applies.

6. Subscription, billing and automatic renewal

Paid access is an ongoing subscription. You choose a monthly or an annual plan, and it renews automatically at the plan price at the end of each billing period (each month, or each year) until you cancel. Payment is taken at the start of each period through our payment provider, Stripe; we do not see or store your full card details, and your payment is also subject to Stripe’s terms.

Prices are shown in New Zealand dollars before you pay, and the price shown when you subscribe or renew is the price that applies. We are not currently registered for GST, so no GST is added. For the annual plan we will send a reminder email before it renews. If a renewal payment fails, we may retry it and may pause or, after repeated failures, cancel your paid access; your account and any free access are not affected.

If we change the subscription price, we will tell you in advance (see section 15), and the new price only applies from your next renewal, so you can cancel first if you do not want it.

7. Cancelling

You can cancel at any time from “Manage billing” in the app (the Stripe customer portal), in a few clicks. When you cancel, your paid access continues until the end of the period you have already paid for and is not renewed after that. We do not charge a cancellation fee.

8. Refunds

Because paid access is available immediately and continues until the end of your paid period after cancelling, subscription fees are generally non-refundable, except where the Consumer Guarantees Act 1993 or other New Zealand law gives you a right to a remedy (see section 16). If something has gone wrong, contact us and we will work with you to put it right.

9. Acceptable use

You agree not to:

• share, resell, sublicense, or give others access to your account or paid content;
• copy, scrape, or redistribute the Content;
• use the Service or the Content to develop, train, or improve any machine-learning model, dataset, or product that competes with the Service;
• reverse engineer, decompile, or try to extract the source code, answer keys, or hidden solutions, except to the extent this restriction is not allowed to be imposed by law;
• use bots, scrapers, or other automated means to access the Service, or attempt to break, overload, probe, or get around its security or access controls;
• upload anything harmful (such as malware), infringe anyone’s intellectual property, or post unlawful, harassing, or offensive material;
• use the Service to break the law or any exam or assessment rules; or
• enter personal, private, or sensitive information into answer or feedback boxes. What you type to check an answer or get a hint is sent to third-party tools (including an AI tutor provider) to run the Service, so keep it to your maths working (see the Privacy Policy).

10. No guarantee of results

The Service is a study aid, not a substitute for your teacher, your class, or official NZQA materials. Answers are checked automatically by a computer algebra engine, which is thorough but not infallible; a mark may occasionally be wrong, and the hint tutor can make mistakes. We do not guarantee any particular exam grade or outcome. Always defer to your teacher and the official standards. If you think a question is marked wrongly, please report it (see below) so we can fix it.

11. Our content, your content, and feedback

The Content is owned by us (or our licensors) and is provided for your personal study only. You may not reproduce, distribute, or create derivative works from it without our permission. Our name, logo, and branding are our trade marks. All rights not expressly granted to you are reserved.

You keep ownership of Your Content. You give us a non-exclusive, royalty-free, worldwide licence to use Your Content to operate, support, secure, and improve the Service (for example, to check your answer, generate a hint, and act on a problem report), in line with our Privacy Policy. If you send us feedback or suggestions, we may use them freely, without any obligation to you.

12. Third-party services

The Service relies on third parties, including Google (sign-in), Stripe (payments), and the providers listed in our Privacy Policy. Your use of those services is also subject to their own terms, and we are not responsible for third-party services we do not control.

13. Privacy

How we collect, use, store, and share personal information (including where it is processed overseas, and how we handle students’ information) is set out in our Privacy Policy, which forms part of these terms.

14. Availability

We aim to keep the Service available but cannot promise it will be uninterrupted or error free, and we may change, suspend, or discontinue features. Usage is seasonal, so we may do maintenance outside the exam period where we can.

15. Changes to these terms

We may update these terms from time to time. If a change is minor (for example, wording or contact details) we will update this page and the “last updated” date. If a change is significant, or affects a paid subscriber, we will give reasonable advance notice by email or in the app. For paid subscribers, a change that materially reduces what you get, or increases the price, takes effect only from your next renewal, and you can cancel before then if you do not accept it. Using the Service after a change takes effect means you accept the updated terms.

16. Our responsibility if something goes wrong

Nothing in these terms limits or excludes your rights under the Consumer Guarantees Act 1993, the Fair Trading Act 1986, or other New Zealand law that cannot be excluded for consumers, and nothing limits our liability for fraud. Those rights and this carve-out sit above everything else in this section.

Subject to that, the Service is provided with reasonable care and skill but on an “as available” basis, and we are not responsible for indirect or consequential loss, or for loss of profits, revenue, data, or goodwill, or for exam results. To the extent the law allows us to limit our liability, our total liability to you for all claims in any 12 month period is limited to the greater of the amount you paid us for the Service in that period, or NZ$100.

17. Suspension and closing accounts

We may suspend or close an account that breaches these terms or misuses the Service, and where practical we will warn you first. If we close a paid subscriber’s account and it is not because of something they did wrong, we will refund the unused part of what they have already paid. You can close your own account at any time by contacting us or through the app. When an account is closed, your right to use the Service ends, and your information is handled as set out in the Privacy Policy.

18. Schools and business customers

If you acquire the Service for a school or other business (for example, a class licence), you agree you are acquiring it for business purposes, and the Consumer Guarantees Act 1993 and Part 2 of the Contract and Commercial Law Act 2017 do not apply, to the extent the law allows this to be agreed in writing. In that case you also indemnify us against claims, losses, and costs arising from your breach of these terms or from how your users use the Service, except to the extent we caused them. Additional terms for a school licence, if any, are agreed separately and prevail over these terms where they conflict.

19. Events outside our control

We are not responsible for failure or delay caused by something beyond our reasonable control (for example, outages at our hosting, payment, or AI providers, or a loss of internet or power). This does not affect your rights under the Consumer Guarantees Act 1993.

20. Notices

We may contact you by email (at your account address) or through the app. You can contact us at harrisson.jull@gmail.com or [YOUR NEW ZEALAND CONTACT ADDRESS]. It is your responsibility to keep your account email current.

21. General

If any part of these terms is found to be unfair, unlawful, or unenforceable, that part is severed and the rest continues to apply. You may not transfer your account or these terms to anyone else. We may transfer our rights and obligations under these terms (for example, if the Service is sold), but not in a way that reduces your rights. A delay in enforcing a term is not a waiver of it. The sections that by their nature should continue after your account ends (including sections 11, 16, 18, and 21) survive. These terms and the Privacy Policy are the whole agreement between us about the Service; if they conflict, these terms prevail, except on privacy matters, where the Privacy Policy prevails. Nothing in these terms makes us and you partners or agents of each other.

22. Governing law and disputes

These terms are governed by New Zealand law and the New Zealand courts have jurisdiction. If something goes wrong, please contact us first and we will try to resolve it. Nothing here stops you using the Disputes Tribunal, making a complaint to a regulator, or exercising any other right you have under New Zealand law.

23. Contact

Questions about these terms, your account, or a problem with the app? Email harrisson.jull@gmail.com, or use the button below to report a problem.