Terms of use

These terms apply to the CatchClock website you are reading and to the CatchClock application for mobile devices, together with any related services operated by IURII FILIN (the Service Provider). By using either one you agree to these terms, and you should read them before you do. They are effective as of September 25, 2026. How personal data is handled is a separate document, the privacy policy, linked in the footer of every page.

What these terms cover

The website and the app are different products, and several sections below apply to only one of them. Rather than leave you to work out which, here is the difference in full.

The website needs no account or sign-in and has none; the app may require one for some features. Nothing on the website accepts content from you — there is no box to type in — while the app may let you post or upload where it offers that. The website never requests your device location; the app uses it for location-based features. The website loads no third-party SDKs at all; the app uses the ones named below. And the website is free to read, while the app is free unless its store listing says otherwise. Sections about accounts, uploads and app stores therefore concern the application, not this website.

Using the website

The website is free to read and needs no account. You may read it, print it, quote it with attribution and link to any page. You may not copy the site wholesale, present it as your own, or scrape it in a way that degrades it for other readers; automated access is welcome within what the site's robots.txt allows. You must be legally permitted to use the site in your jurisdiction, and at least 16 years of age, or have a parent or legal guardian accept these terms on your behalf.

The data files, and what you may do with them

The machine-readable files the site publishes are offered for re-use, and each one carries its own terms field naming the agencies the records came from and the attribution expected. Those terms travel with the data: where a source requires a citation, that citation is part of the record and must survive into whatever you build. Some sources are share-alike, so their records are kept as separate entries rather than mixed into ours, and re-use has to respect that separation.

The files are a snapshot, not a live service. They are rebuilt when the underlying registry is harvested again, addresses may change between versions of the schema, and nothing here is a commitment to keep any particular file at any particular address. Build on them with that in mind.

What the forecast is, and what it is not

Every number on this site is computed, not measured, and this is the most important thing in these terms. Solunar bite windows are a prediction from a theory published in 1926, not an observation of fish; tide heights and times are our own harmonic calculation from published constants, not the official prediction of a hydrographic service; sun and moon times are astronomy. How each is produced, and when each is unreliable, is set out on the methodology page.

Use them as planning information and nothing more. Do not use this site or the app as a navigation aid, as a source of safety-critical water levels, or in place of an official tide table, a marine forecast or local regulations. Conditions on the water, closures and licence requirements are set by the relevant authority, and checking them is yours to do. The Service Provider accepts no liability for decisions taken on the basis of these numbers, to the extent the law permits that exclusion.

Licence to use the CatchClock app

Subject to your compliance with these terms, the Service Provider grants you a limited, non-exclusive, non-transferable, revocable licence to install and use the application on a mobile device or computer for personal or internal business purposes. You may not reproduce, distribute, modify, create derivative works from, reverse engineer, decompile or disassemble the application, except to the extent applicable law expressly permits it. Extracting the source code, translating the application into other languages or creating derivative versions is not permitted.

The Service Provider may modify the application or charge for its services at any time; any charge will be communicated clearly before it applies. It is your responsibility to maintain the security of your device and of access to the application. Jailbreaking or rooting a device removes protections imposed by its operating system, can expose it to malware and may stop the application working correctly or at all; the Service Provider advises against it.

Intellectual property

The Service Provider retains all intellectual property rights in the application and the site, including code, design, trademarks, service marks, trade names, logos and branding. Nothing in these terms grants you a licence to use those trademarks, logos or branding for any purpose. You agree not to remove, alter or obscure any copyright, trademark or other proprietary notice displayed in or on either product. Unauthorized copying or modification of the application, of any part of it, or of the Service Provider's trademarks is prohibited. This paragraph is about our own marks and code — it does not restrict the re-use of published data described above, which has its own terms.

User content and acceptable use

This website accepts no content from readers: there is no account, no comment box and no upload, so nothing in this section can apply to it. Where the application allows you to post, share or upload content, you agree not to post content that is illegal or infringes third-party intellectual property rights; that is abusive, threatening, harassing, defamatory or hate speech; that contains discrimination or incitement to violence or illegal activity; that is spam, phishing or malware; that violates the privacy or data rights of others; that is misleading, false or deceptive; or that contains explicit violence or sexual content unless appropriately age-gated.

By submitting content you grant the Service Provider a non-exclusive, worldwide, royalty-free licence to use, reproduce, distribute, prepare derivative works of, display and perform that content in connection with the application and the Service Provider's business. That licence does not include the right to sell or sublicense your content to third parties independently of the application. You represent that you own or control all rights in what you post. Content you submit may include personal data; its processing is governed by the privacy policy, and you should not post other people's personal data without their consent.

Reporting content, moderation and appeals

The Service Provider may remove or disable access to content that breaks these terms, suspend or terminate accounts of users who do so repeatedly, moderate, filter or hide such content, and cooperate with law enforcement where illegal content is reported. Content submitted through the application may be visible to other users or to the public, depending on how the application works.

If you believe content breaks these terms, infringes your rights or is unlawful, report it to [email protected] with enough detail to identify the content, assess the complaint and contact you if follow-up is needed. Where the application offers them, you may also report content, block users or mute notifications in the interface itself; in-app reports are reviewed to the same standard. If a moderation decision affects you, you may ask for a further review at the same address; the Service Provider will respond within a reasonable period and give reasons for any decision it upholds, subject to applicable law.

Third-party services used by the app

The application relies on the services below, each governed by its own terms. None of them is used by this website; what the website loads is listed in the privacy policy.

Google Play Services, Google Analytics for Firebase, Firebase Crashlytics, Facebook, Amplitude and Adjust. Each is governed by its own terms, linked above

Connectivity, devices and charges

Some functions need an active internet connection, over Wi-Fi or a mobile network, and the Service Provider is not responsible if the application does not work at full capacity because that connection is unavailable or your data allowance is exhausted. Your agreement with your mobile network or internet provider continues to apply and you may incur charges for data used, including roaming charges if you use the application outside your home territory without disabling data roaming. If you are not the bill payer for the device, you are assumed to have the bill payer's permission. Keeping the device charged is also yours: if it runs out of battery and you cannot reach the service, that is not something the Service Provider can be responsible for.

Updates, suspension and termination

The application is published for current operating system requirements, and those requirements change; you will need to install updates to keep using it. The Service Provider does not guarantee that it will always update the application to remain relevant to you or compatible with the version of the operating system on your device, and may cease supporting earlier versions once an update is offered. The Service Provider may also stop providing the application at any time.

If you materially breach these terms, the Service Provider will give you written notice and, where the breach can be cured, 14 days from receipt to remedy it before access is terminated. Access may be suspended or terminated immediately and without notice if you break the law, infringe intellectual property rights, or act in a way that could harm other users or the Service Provider. On termination your licence ends and you must delete all copies of the application from your devices.

Limitation of liability and indemnification

To the fullest extent permitted by law, the Service Provider is not liable for indirect, incidental, special, consequential or punitive damages, including lost profits, data loss or business interruption, even if advised of the possibility. Full liability is retained for death or personal injury caused by negligence, for fraud or fraudulent misrepresentation, and for anything else that cannot lawfully be excluded. Total liability for any claim will not exceed the greater of what you paid for the application in the twelve months before the claim and the minimum the law requires; where the application is free, that means the legal minimum. No liability is accepted for loss caused by relying entirely on third-party information, or for inaccuracies in content provided by third parties.

To the fullest extent permitted by law, you agree to indemnify the Service Provider, its affiliates, officers, directors, employees and agents against claims, liabilities, damages, losses and expenses, including reasonable legal fees, arising directly from your breach of these terms or your intentional misuse of the application, including content you submit in breach of them. This does not apply to claims arising from the Service Provider's own negligence, breach of these terms or violation of law, and it is limited to the maximum extent permitted where consumer indemnification is restricted. Nothing in these terms limits rights you have under consumer protection law that cannot lawfully be excluded.

Governing law and jurisdiction

These terms are governed by the laws of the jurisdiction in which the Service Provider is established, excluding conflict of law rules, except where mandatory consumer protection law provides otherwise. Any dispute will be brought before the courts that have jurisdiction under applicable law, and nothing here limits any right you have to bring a claim in a court that is competent under mandatory law.

Digital Services Act

Where the application qualifies as an intermediary service under Regulation (EU) 2022/2065, the following apply in addition to the terms above. A single point of contact for EU authorities and for recipients of the service is reachable at [email protected]; where the Service Provider is established outside the European Union, a legal representative in the EU has been designated under Article 13.

When access to content is restricted, an account suspended or terminated, or the availability of a feature limited, the affected user is given a clear statement of reasons covering the nature of the restriction, its legal or contractual basis and the redress available, under Article 17. Notices of allegedly illegal content may be sent to the address above; they are acknowledged electronically and decided without undue delay, with human review where the circumstances require it, under Article 16. Disputes about moderation decisions may be referred to a certified out-of-court dispute settlement body under Article 21, which does not affect your right to a judicial remedy. Periodic transparency reports covering moderation activity are available on request under Article 24. These provisions do not replace or limit rights under consumer protection or data protection law.

Severability, changes and contact

If any provision of these terms is held invalid, illegal or unenforceable, it will be modified to the minimum extent needed to make it valid and enforceable, and the rest remains in force. These terms, together with the privacy policy, are the entire agreement between you and the Service Provider about your use of the site and the application, and supersede any earlier understanding.

These terms may be updated from time to time; changes are announced by posting the new text on this page, and the date at the top is the effective date, moving only when the text does. Previous versions are kept and available on request. For any question or suggestion about these terms, write to [email protected].