Terms of Use

Last updated: September 10, 2026

These Terms of Use (“Terms”) govern your use of the websites and mobile applications provided by Rhumb Line Apps LLC (“Rhumb Line Apps,” “we,” “us,” or “our”), including ICW Planner (the “App”). By downloading or using the App, you agree to these Terms. If you do not agree, do not use the App.

Safety notice — please read. The App is a planning and informational aid only. It is not a navigation system and must never be used as a sole means of navigation or for any decision affecting the safety of life, property, or the environment. Tide and current values are predictions; bridge schedules, clearances, and hazards can change without notice; and mile markers and routes are approximate. Always navigate using official, up-to-date NOAA charts and U.S. Coast Guard publications, proper equipment, and prudent seamanship.

1. License

Subject to these Terms, we grant you a personal, limited, non-exclusive, non-transferable, revocable license to use the App on Apple-branded devices you own or control, as permitted by the App Store Terms of Service. You may not copy, modify, reverse-engineer, redistribute, or create derivative works from the App except as allowed by law.

2. Free and Pro features; purchases

The App offers free features and optional paid “Pro” features available as a one-time purchase or an auto-renewing subscription. All purchases are processed by Apple through the App Store and are subject to Apple’s terms. Prices are shown in the App before purchase and may change.

Auto-renewing subscription terms

Payment is charged to your Apple Account at confirmation of purchase.
The subscription automatically renews unless auto-renew is turned off at least 24 hours before the end of the current period.
Your account is charged for renewal within 24 hours prior to the end of the current period, at the rate disclosed in the App.
You can manage or cancel your subscription, and turn off auto-renew, in your Apple Account settings after purchase.
A one-time (“lifetime”) purchase is not a subscription and does not auto-renew.

Except where required by law or Apple’s policies, purchases are non-refundable. Refund requests are handled by Apple.

3. Acceptable use

You agree to use the App lawfully and not to interfere with its operation, attempt to gain unauthorized access, or misuse the third-party data sources the App relies on.

4. Marks and notes you submit

The App lets you place a mark on the chart — a shoal, hazard, anchorage, marina, dock, mooring field, or note — and choose to send it in so that it can warn or help other boaters. What you send (the position you chose, the note you wrote, and a name or the name of your boat if you filled that field in) is your “Submitted Content.” Sending is always a deliberate act on your part; the App never transmits a mark on its own, and every other feature works without you ever sending one.

What you agree not to send

You are responsible for your Submitted Content. You agree that you have the right to submit it, and that you will not submit anything that:

Is unlawful, defamatory, harassing, hateful, threatening, obscene, or invasive of anyone’s privacy;
Identifies or targets another person, or names a vessel other than your own in a derogatory way;
Infringes anyone’s copyright, trademark, or other rights;
Is advertising, promotional material, or spam;
Contains malicious code, or is designed to disrupt the App or the service that receives submissions;
Reports a hazard, depth, or other navigational condition that you know to be false. Other boaters may act on what you send, so a deliberately false report is a serious matter, not a prank.

Nothing is published until a person has read it

Submitted Content is not visible to anyone else at the moment you send it. Every submission is held in a private queue and reviewed by a person at Rhumb Line Apps before it can appear in the App. We may approve, edit, decline, or later remove any submission, at any time, for any reason or for none, and we are under no obligation to publish anything you send. If a submission is approved, it may be shown to other users of the App, including the note you wrote and any name you supplied.

Reporting something objectionable

If you see content in the App that you believe breaches these Terms, email support@rhumblineapps.com with enough detail to identify it. We aim to review every report within 24 hours and will remove content that breaches these Terms. We may refuse further submissions from, or block, anyone who repeatedly submits content that breaches these Terms.

The rights you give us, and the ones you keep

You keep whatever rights you already had in your Submitted Content. By sending it, you grant Rhumb Line Apps a worldwide, non-exclusive, royalty-free, sublicensable, and transferable licence to host, store, reproduce, adapt, publish, and display it in the App and in materials about the App, for as long as it remains useful to other boaters. You can ask us to remove your Submitted Content at any time, as described in our Privacy Policy, and we will do so. To the extent the law allows, you waive any moral rights in your Submitted Content.

Other boaters’ marks are not survey data

A mark submitted by another user is an unverified report from a member of the public. Our review checks that a submission is plausible and not objectionable; it does not verify that the condition reported is real, accurate, or still there. Submitted Content is an observation, not official navigational information, and the safety notice at the top of these Terms applies to it with particular force. Never rely on another boater’s mark for a decision affecting the safety of life, property, or the environment.

5. Third-party data

The App displays information derived from third-party and government sources, including NOAA and the U.S. Coast Guard. We do not create this underlying data and do not warrant its accuracy, completeness, timeliness, or availability.

6. Disclaimer of warranties

THE APP AND ALL CONTENT ARE PROVIDED “AS IS” AND “AS AVAILABLE,” WITHOUT WARRANTIES OF ANY KIND, WHETHER EXPRESS, IMPLIED, OR STATUTORY, INCLUDING WITHOUT LIMITATION IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, ACCURACY, AND NON-INFRINGEMENT. WE DO NOT WARRANT THAT THE APP WILL BE UNINTERRUPTED, ERROR-FREE, OR THAT ANY INFORMATION IS ACCURATE OR CURRENT.

7. Limitation of liability

TO THE MAXIMUM EXTENT PERMITTED BY LAW, RHUMB LINE APPS AND ITS MEMBERS, OFFICERS, AND AGENTS WILL NOT BE LIABLE FOR ANY INDIRECT, INCIDENTAL, SPECIAL, CONSEQUENTIAL, OR PUNITIVE DAMAGES, OR ANY LOSS OF PROFITS, DATA, PROPERTY, OR GOODWILL, ARISING OUT OF OR RELATING TO YOUR USE OF (OR INABILITY TO USE) THE APP, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. OUR TOTAL LIABILITY FOR ANY CLAIM RELATING TO THE APP WILL NOT EXCEED THE AMOUNT YOU PAID US FOR THE APP IN THE 12 MONTHS BEFORE THE CLAIM. SOME JURISDICTIONS DO NOT ALLOW CERTAIN LIMITATIONS, SO SOME OF THE ABOVE MAY NOT APPLY TO YOU.

8. Indemnification

You agree to indemnify and hold harmless Rhumb Line Apps from any claims or damages arising out of your misuse of the App or violation of these Terms.

9. Apple

These Terms are between you and Rhumb Line Apps only, not with Apple. Apple is not responsible for the App or its content. Apple and its subsidiaries are third-party beneficiaries of these Terms and may enforce them against you.

10. Changes

We may update these Terms from time to time. Continued use of the App after changes take effect constitutes acceptance of the updated Terms.

11. Governing law

These Terms are governed by the laws of the State in which Rhumb Line Apps LLC is organized, without regard to conflict-of-laws principles, except where local consumer-protection law requires otherwise.

12. Contact

Rhumb Line Apps LLC
Email: support@rhumblineapps.com