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Terms of use

The agreement between you and Knotlog, including purchases in the App Store.

Scope

These terms cover the website, the phone apps and the watch apps of Knotlog. The provider is Philipp Winkler, sole proprietor, Burghof 1, 24939 Flensburg, Germany (details in the legal notice). How we handle your data is in the privacy policy.

What Knotlog is

Knotlog is a private sailing logbook: the watch app records legs, the website shows voyages, nautical miles, harbours, weather and crew and turns them into a mileage proof. The logbook is free. Some features are part of Premium or the Voyage Pass.

Your account

You must be at least 16. An account belongs to one person. Keep your password secret and tell us if someone else has access. You can delete your account at any time.

Your content and the crew

Voyages, notes and photos stay yours. You only allow us to store, process and show them to you while you have an account. Upload only photos you hold the rights to. Add fellow sailors only with their agreement, and tick the box for a name in the proof only if the person agreed.

Premium, subscriptions and the Voyage Pass

You see prices and periods before you buy, on the prices page and in the store. Premium costs €4.99 a month, €39.99 a year or €99 once. The prices shown are final prices: no VAT is charged under § 19 UStG. There are three kinds:

  • Premium monthly or yearly is a subscription. In the browser: You pay in advance for the chosen period (one month or one year). After the first period the subscription continues for an indefinite time and is billed for each following period. You can cancel the monthly plan and the yearly plan within its first twelve months (minimum term) at any time, effective at the end of the current paid period. After the first twelve months the yearly plan continues for an indefinite period and can then be cancelled at any time with one month's notice (§ 309 no. 9 German Civil Code). Premium stays active until the cancellation takes effect. You can cancel at any time with the “Cancel contracts here” button in the footer of every page, also without signing in, or in your account under “Manage subscription and invoices” (Stripe customer portal) or by email to [email protected]. Amounts paid in advance for periods after the cancellation takes effect are refunded pro rata, automatically to the original payment method; your statutory right of withdrawal is unaffected. In the app the purchase goes through the store: payment is charged to your Apple ID or Google account at confirmation of purchase, and the subscription renews automatically there for the same period unless you cancel at least 24 hours before the end of the current period in your Apple ID's subscription settings or in Google Play. Premium stays active until the end of the paid period.
  • Premium one-off (lifetime) costs €99 once (Stripe, one-time payment). It is not a subscription, does not renew and needs no cancellation. Premium stays with you as long as we operate Knotlog; if we shut the service down, we will announce it in good time.
  • The Voyage Pass is valid for 30 days from purchase and includes one PDF proof. It is not a subscription and does not renew.

On a new phone, use "Restore purchases" in the app. When Premium or the pass ends, your logbook stays complete; only the paid features close again.

Right of withdrawal

For purchases through the App Store or Google Play, withdrawal and refunds follow the store's rules; you request a refund there. For purchases in the browser (Stripe), consumers in the EU have the statutory right of withdrawal below. The German version is binding; this English text is a courtesy translation.

Withdrawal notice

Right of withdrawal

You have the right to withdraw from this contract within fourteen days without giving any reason.

The withdrawal period will expire after fourteen days from the day of the conclusion of the contract.

To exercise the right of withdrawal, you must inform us (Philipp Winkler, Burghof 1, 24939 Flensburg, Germany, email: [email protected]) of your decision to withdraw from this contract by an unequivocal statement (e.g. a letter sent by post or an email). You may use the attached model withdrawal form, but it is not obligatory.

To meet the withdrawal deadline, it is sufficient for you to send your communication concerning your exercise of the right of withdrawal before the withdrawal period has expired.

Effects of withdrawal

If you withdraw from this contract, we shall reimburse to you all payments received from you without undue delay and in any event not later than fourteen days from the day on which we are informed about your decision to withdraw from this contract. We will carry out such reimbursement using the same means of payment as you used for the initial transaction, unless you have expressly agreed otherwise; in any event, you will not incur any fees as a result of such reimbursement.

If you asked for the service to begin during the withdrawal period, you must pay us an amount in proportion to what has been provided until you informed us of your withdrawal, compared with the full coverage of the contract.

Early expiry

Your right of withdrawal expires once we have fully performed the service, provided we began only after you expressly agreed that we start before the withdrawal period ends and confirmed that you lose your right of withdrawal upon full performance (§ 356(5) BGB). You give this consent and confirmation with a tick box at checkout.

Model withdrawal form

(Complete and return this form only if you wish to withdraw from the contract.)

To Philipp Winkler, Burghof 1, 24939 Flensburg, Germany, email: [email protected]:
I/We (*) hereby give notice that I/We (*) withdraw from my/our (*) contract for the provision of the following service or digital content (*): Premium of Knotlog
Ordered on (*) / received on (*):
Name of consumer(s):
Address of consumer(s):
Signature of consumer(s) (only if this form is notified on paper):
Date:
(*) Delete as appropriate.

Orders of goods from the merch shop have a right of withdrawal of their own, running from receipt of the goods. The full notices for digital services and for goods, with both model withdrawal forms, are on the withdrawal notice page.

Merch shop (purchase of goods)

Conclusion of contract

The presentation of items in the shop is not a binding offer. By completing the payment process you place a binding order. We confirm receipt by e-mail; the contract of sale is concluded with that confirmation, at the latest when the goods are shipped. Your contracting party is Philipp Winkler, Burghof 1, 24939 Flensburg, Germany.

Made to order

Items are produced only after your order by our production partner Printful (print on demand) and shipped directly to you from the EU. For this we pass your name and delivery address on to Printful (see the privacy policy). Colours may differ slightly depending on your screen and the printing process.

Prices and shipping

The final prices shown at the time of your order apply. In accordance with § 19 UStG no value added tax is charged. Shipping is a flat 4.90 EUR within Germany and 7.90 EUR to another EU country. We only deliver to addresses in Germany and the rest of the EU.

Delivery time

Production usually takes 2 to 5 working days, shipping afterwards 2 to 4 working days in Germany and 3 to 7 working days in the rest of the EU. In total expect about 4 to 9 working days within Germany and 5 to 12 working days to the rest of the EU. These are estimates, not binding delivery dates.

Payment

Payment is made through Stripe and is due with the order; production starts once payment has been received.

Retention of title

The goods remain our property until paid in full.

Statutory warranty

The statutory warranty for defects applies. If the goods arrive damaged or defective, please write to [email protected] as soon as possible with a photo; we will arrange replacement or refund under the statutory rules.

Withdrawal and returns

As a consumer you can withdraw from a purchase of goods within 14 days of receiving them. Details, the model withdrawal form and the rules on costs are in the withdrawal notice. You bear the direct cost of returning the goods. Returns go to: Philipp Winkler, Burghof 1, 24939 Flensburg, Germany.

Purchases through the App Store (EULA)

If you download Knotlog from Apple's App Store, Apple's standard Licensed Application End User License Agreement applies in addition. These terms are between you and us, not Apple; Apple is not responsible for the app or its content. For Google Play, the Google Play Terms of Service apply in addition.

Availability

We work to keep Knotlog available but cannot guarantee it. Track, nautical miles, night hours, harbours and weather are worked out from the watch's measurements; GPS and sensors can be inaccurate or fail.

Not for navigation

Knotlog is a logbook, not a navigation app. It does not replace a chart, a navigation device, a weather forecast or good seamanship. The person in command is responsible for the safe handling of the vessel, the skipper for equipment, weather and route. Never base decisions about your safety on board on the app.

Mileage proof

The mileage proof sums up what is in your logbook. It is not an official logbook or certificate and does not replace the ship's logbook. Whether a charter company or an examination board accepts it is up to them; the skipper's signature confirms the entries, not we. Enter only voyages you actually sailed.

Liability

We are liable without limit for intent and gross negligence and for injury to life, body or health. For slight negligence we are liable only for breach of essential contractual obligations, limited to the foreseeable damage typical for the contract. Liability under the German Product Liability Act remains unaffected.

Changes

If we change these terms materially, we tell you by email beforehand. Running subscriptions and passes keep the old terms until the end of the paid period.

Governing law

German law applies. If you are a consumer, you keep the mandatory protection of the country you live in.

Last updated: October 28, 2026

Knotlog · A logbook, not a navigation app. Private. No live position, no public map.
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