Terms of service

Version 2026-09-30

1. About these terms

These terms are the agreement between you and Donkey Analytics ("we", "us"). You can reach us at hello@mail.donkeyanalytics.co.uk. The privacy notice explains what we do with your data.

You accept these terms when you create an account, and again when you subscribe. The version you accepted is stored with your account.

2. Your account

• You must be 18 or over, or use the service with a parent's or guardian's permission.
• An account is for one person. Keep your password to yourself: whatever is done while signed in to your account is your responsibility.
• Use an email address you read. We send password resets, receipts and important notices there.

3. The service

Donkey Analytics imports your GPS and instrument logs and analyses them: performance, polars, manoeuvres, races and calibration. We keep improving it, so features may change. If we remove something important to you, we tell you first.

It is for looking back at your sailing, not for navigating. Maps, charts and figures can be wrong or incomplete. Never rely on them for navigation, safety or the racing rules.

4. The free trial

A new account has 14 days free. You do not need a card for the trial, and nothing is charged when it ends. After it ends you need a subscription to keep using the app, and everything in your library stays until you subscribe or ask us to delete your account.

5. Prices and payment

• You pay per boat per month. Each boat's price depends on its type, and you see it, and agree to it, before the boat is added or billed.
• Before you subscribe, the app shows each boat, its price and the total. Nothing is charged until you confirm.
• Stripe takes the payments. You pay monthly in advance, from the day your subscription starts or your trial ends.
• The subscription renews automatically every month until you cancel.
• When you add, confirm or remove a boat, the difference is worked out to the day and settled on your next invoice.
• If we change a price, we tell you at least 30 days before the new price applies to boats you have already confirmed, and you can cancel before then.
• If a payment fails, Stripe tries again for a few days. If it still fails, the subscription ends and the app is locked until you subscribe again. Your data stays.

6. Cancelling your subscription

You can cancel at any time. On the billing page, Invoices, card and cancelling opens Stripe's page, where you cancel in a couple of clicks. You can also email us. The subscription then runs to the end of the month you have paid for and stops. We do not refund the rest of that month, except under section 7.

7. Your right to cancel within 14 days

If you are a consumer, you can cancel your subscription within 14 days of the day you subscribe, without giving a reason. To cancel, tell us clearly before the 14 days are up, by email to hello@mail.donkeyanalytics.co.uk. You can use the model form below, but you do not have to.

When you subscribe, you ask us to start the service straight away rather than after the 14 days. So if you cancel within them, you pay for the service up to the moment you tell us, in proportion to the month, and we refund the rest. Any time still in your free trial costs nothing. We refund you within 14 days of hearing from you, to the card you paid with.

This right is on top of your right to cancel at any time under section 6.

8. Your content

• Your tracks, polars, boats and everything else you import stay yours. You let us store and process them to provide the service to you, and to keep an anonymised copy of your tracks once your account is deleted, as the privacy notice explains.
• Upload only what you have the right to. If someone shares their track with you, it is yours to analyse, not to publish.
• We copy a track or polar into another person's account only when its owner asks or agrees, for example for a coach or a crew mate. Every copy is logged.
• You can download everything at any time with Download my data on Your account.

9. What belongs to us

The service is ours. Its software and source code, its methods of analysis, its design, text and graphics, and the name Donkey Analytics and its logo belong to us or to those who license them to us. These terms let you use the service through your account while your trial or subscription lasts. They give you no other right to it.

Unless we agree in writing, you must not:

• copy, adapt or reproduce the service or any part of it, or make anything based on it;
• decompile, disassemble or reverse engineer its software, or try to get at its source code, except as far as the law lets you whatever these terms say;
• scrape it, or use bots or scripts to copy its pages, figures or data, beyond the downloads it offers you;
• use the service, or what it produces, to build or improve a product or service that competes with it, or to train an AI or machine-learning model that does;
• sell, rent or lend access to the service, or let anyone else use your account;
• use our name or logo as if it were yours, or remove or hide any notice of our rights in the service.

The charts, reports and PDFs the service makes from your tracks are yours to keep, print and share, for example with your crew, your coach or your class. What stays ours is the service that makes them.

If you send us ideas or suggestions, we may use them without owing you anything for them.

We treat copying the service, scraping it or using it to build a rival as a serious breach of these terms (see Ending the agreement).

10. Using the service fairly

Do not use the service to break the law, try to reach anyone else's account or data, overload or attack it, upload anything harmful, or copy and resell it.

11. Keeping the service running

We work to keep the service available, but it can be interrupted for maintenance or by faults outside our control. If we ever close the service, we give you at least 30 days' notice and time to download your data, and we refund anything you have paid for time after it closes.

12. Our responsibility to you

• We provide the service with reasonable care and skill. If you are a consumer, the law gives you rights that these terms do not take away.
• If we break these terms, we are responsible for loss you suffer that was a foreseeable result, but not for loss nobody could have foreseen.
• If you use the service for a business, we are not responsible for lost profit, business or opportunity, and our total responsibility is limited to what you paid us in the 12 months before the problem arose.
• Nothing in these terms limits our responsibility for death or personal injury caused by our negligence, for fraud, or for anything else the law does not let us limit.

13. Ending the agreement

• You can end this agreement at any time by asking us by email (privacy@mail.donkeyanalytics.co.uk) to delete your account. Deleting it cancels any subscription at once and deletes your data, except the anonymised copy of your tracks.
• We may suspend or close an account that seriously or repeatedly breaks these terms. Unless the breach is serious, we warn you first and give you time to put it right or download your data.

14. Changes to these terms

We may update these terms. If a change matters to you, we email you at least 30 days before it applies, and you can cancel before then. The version at the top of this page says which terms apply.

15. Law and disputes

If something goes wrong, please tell us first; most problems can be sorted out quickly. These terms are governed by the law of England and Wales, and its courts deal with any dispute. If you live in Scotland or Northern Ireland, you can also bring a claim in your local courts.

Model cancellation form

Only fill in and send this form if you want to cancel within the 14-day period in section 7. An email saying so works just as well.