Terms of Service

Last updated: November 3, 2026

1. Acceptance of Terms

These Terms of Service (“Terms”) govern your access to and use of theONE Vessel Command Center (“theONE” or the “app”), operated by JEMS Marine, LLC (“JEMS Marine,” “we,” “us,” or “our”). By accessing or using theONE, you agree to be bound by these Terms. If you do not agree, do not use the app.

2. The Service

theONE is an iOS application that helps captains manage vessel information, including trip planning, charts and weather, telemetry, maintenance, stowage, and crew. On a paid plan, a boat’s owner or manager — or a captain the owner has also made manager — can also sign in on theonevcc.com to read her record and add documents on the web. The person signing in and the boat’s owner both need a paid plan. theONE has a Free plan; paid plans add features, as section 4a says. We do not warrant that the service will be uninterrupted, error-free, or available at all times.

3. Eligibility

You must be at least 13 years old to use theONE. If you are under 18, a parent or legal guardian must agree to these Terms for you.

4. Accounts

theONE works with no account. There is an optional sign-in — in the app, with Sign in with Apple, or with your email address and a six-digit code we email you; either one makes your account the first time — which lets a second device of yours, and your crew, reach the same boat; it is not required to use the app. A password is optional; you can add one later in the app. If you set one, keep it to yourself; you are responsible for what is done with your account. Until you sign in, everything you enter is stored on your device only. What we hold once you do sign in is set out in section 3a of our Privacy Policy. You are responsible for the security of your own device and of any backup you choose to make of it (such as an iCloud or local encrypted iPhone backup, or a theONE backup file and its passphrase), since that is where your vessel data lives (and, once you sign in, on our server, as section 3a of our Privacy Policy describes).

4a. Plans, Subscriptions and Purchases

• Sold through Apple. theONE’s paid plans are auto-renewing subscriptions sold through Apple’s App Store. Apple takes the payment and charges it to your Apple account; we never see your payment details. The price and the length of each period are the App Store’s, shown on the plan screen before you buy.
• Renewal. A subscription renews automatically at the end of each period, for the same length, unless you cancel it at least 24 hours before the current period ends. Your Apple account is charged for the next period within the 24 hours before it begins.
• Cancelling. Cancel or change a plan in your Apple account: in the iPhone’s Settings app, tap your name → Subscriptions. You keep the plan until the end of the period you paid for, and everything you entered stays yours to view and export. Deleting the app or your theONE account does not cancel a subscription.
• Free trial. Where the App Store says your Apple account is eligible, a new subscription starts with a 1-month free trial. Unless you cancel at least 24 hours before the trial ends, the subscription then begins and your Apple account is charged.
• Founding Captains. The first 50 subscribers to take a Founding Captain plan get Founding Captain prices. You keep that price for as long as your subscription stays active on that plan.
• Refunds and billing questions are Apple’s to decide, under Apple’s own policies; ask Apple through your Apple account.
• The web version. Signing in on theonevcc.com is part of every paid plan. It needs a paid plan on your own account and on the boat owner’s. On the Free plan, everything stays in the app.
• Fleet Pro is not sold through the App Store. It is arranged with us directly and invoiced, on terms we agree with you in writing.
• Apple’s terms also apply. Apple’s standard Licensed Application End User License Agreement, and Apple’s own terms for purchases through the App Store, apply to theONE and to what you buy in it, alongside these Terms. Apple is not responsible for theONE or its support; we are.

Safety features — man overboard, Anchor Watch, the emergency drawer and float plans among them — and logging are on every plan, including the Free plan.

4b. Records Import

• What it is. Records Import is an optional service on the web version, for paid plans: you upload scans of your boat’s past paperwork, we read them and suggest records — dates, engine hours, who did the work, what was done and its cost — and you approve each one before it is added.
• Price and payment. The price is per page and is shown on your order page before you place the order, with any minimum. It is paid to JEMS Marine directly, not through the App Store. Reading starts once the order is paid.
• Turnaround. The turnaround shown with your order is an average estimate in business days, not a promise; it depends on the number of pages and how many orders are waiting.
• Check every record. Suggestions are read from your papers and can be wrong. You are responsible for checking each one before you approve it; approved records are yours, like any record you enter. Pages that cannot be read clearly are returned to you to fill in by hand.
• Your pages. How your pages are handled is set out in section 3b of our Privacy Policy. By placing an order you ask us to read them for this purpose.

5. Acceptable Use

You agree not to:

• Reverse engineer, decompile, or disassemble the app.
• Use the app for any unlawful purpose.
• Interfere with or disrupt the integrity or performance of the service.

6. Captain's Responsibility / Navigation Disclaimer

theONE's safety features are an aid only. They supplement — they never replace — proper seamanship, official charts, required safety equipment, and U.S. Coast Guard and other applicable maritime safety requirements. The captain is solely responsible for the safety of the vessel, crew, and passengers, and for compliance with all applicable maritime laws and regulations, including USCG requirements. Always rely on official charts, required safety equipment, and sound judgment — never on theONE alone.

7. Intellectual Property

theONE, the JEMS Marine marks, and the app itself are owned by JEMS Marine, LLC and are protected by applicable intellectual property laws. These Terms do not grant you any right to use our marks without our prior written permission.

8. Your Data

Data you enter into theONE belongs to you. If you do not sign in, it stays on your device and we hold none of it. If you do sign in, changes to the vessel record travel to our server so your other devices and your crew can receive them, and we hold them there on your behalf — you remain the owner of that data. What we hold, what never travels at all, and how to have an account deleted are set out in section 3a of our Privacy Policy. Other limited paths — optional crash reports or analytics you switch on, feedback you choose to send, the record of your plan and purchases, or the Founding Captain form on this website — are described there too, and nothing leaves your device unless that policy says so.

9. Test Builds and Feedback

We may give test builds of theONE to testers through Apple’s TestFlight. Test builds are provided as they are; their features may change or be removed at any time. We may use feedback you send us to improve the product.

10. Disclaimer of Warranties

To the maximum extent permitted by law, theONE is provided “AS IS” and “AS AVAILABLE,” without warranties of any kind, whether express, implied, or statutory, including any implied warranties of merchantability, fitness for a particular purpose, and non-infringement.

11. Limitation of Liability

To the maximum extent permitted by law, JEMS Marine, LLC will not be liable for any indirect, incidental, special, consequential, or punitive damages, or for any loss of profits or data. Our aggregate liability for any claim relating to the service is capped at the amount you paid us, if any, in the twelve (12) months preceding the claim.

12. Indemnification

You agree to indemnify and hold harmless JEMS Marine, LLC from any claims, damages, liabilities, and expenses arising out of your use of the app or your violation of these Terms.

13. Termination

If you have signed in, we may end that account’s sessions, including for violation of these Terms, which stops it reaching our server. If you test builds through TestFlight, we may also remove you from testing at any time, with or without notice, which stops further test builds from reaching you. Neither reaches into the app or the data already on your device, with one exception set by the boat’s own owner, captain or manager: if your access to a boat that is not yours ends, or you are taken off her, the app removes that boat’s records from your device the next time it reaches our server, keeping your own details, position and dates aboard as a service record. Otherwise what is on your phone stays on your phone, and we have no way to delete or alter it remotely. You may stop using theONE at any time by deleting it from your device; if you subscribe, cancel the subscription in your Apple account as well (section 4a).

14. Governing Law

These Terms are governed by the laws of the State of Maryland, USA, without regard to its conflict-of-laws principles. You agree that venue for any dispute will lie in the state or federal courts located in Maryland.

15. Changes to these Terms

We may update these Terms from time to time. When we do, we will revise the “Last updated” date at the top of this page. Your continued use of theONE after changes take effect constitutes acceptance of the revised Terms.

16. Contact

Questions about these Terms can be sent to ops@jems-marine.com.