Terms of Service.

1. Introduction

These Terms and Conditions ("Terms") govern your use of the Nautis mobile application ("the App"), operated by EightTen Labs (Sole Trader) ("we", "us", "our").

By downloading, installing, or using Nautis, you agree to be bound by these Terms. If you do not agree, do not use the App.

Contact: [email protected]
Last Updated: 13 May 2026

2. The Service

Nautis is a digital maritime logbook application that allows you to:

• Record sailing log entries with navigation, weather, and vessel data
• Track your GPS position during trips
• Store photos alongside log entries
• Manage vessels and trip records
• Add friends and view their sailing activity
• Access your data across devices via cloud synchronisation
• Share an active trip publicly via On Watch share links

3. Account Registration

3.1 Eligibility

Nautis is intended for adult sailors. The App is not designed or marketed for children. If you are under 16, you should have parental consent before using Nautis. We do not currently verify age at signup.

3.2 Account Security

• You are responsible for maintaining the security of your account credentials
• You must not share your account with others
• You must notify us immediately if you suspect unauthorised access to your account
• We are not liable for any loss resulting from unauthorised use of your account

3.3 Account Information

You agree to provide accurate and complete information when creating your account and to keep it up to date. We reserve the right to suspend or terminate accounts that contain false or misleading information.

3.4 Invite Codes

During the alpha and beta phases, access to Nautis may require an invite code. Invite codes are personal and subject to usage limits. We reserve the right to revoke invite codes at any time.

3.5 Public Visibility Acknowledgement

When creating an account, you will be asked to acknowledge separately (by ticking a checkbox provided for this purpose, distinct from your acceptance of these Terms and the Privacy Policy) that you understand log entries, trips, and GPS tracks you record in Nautis are publicly visible to other Nautis users by default. This acknowledgement is a condition of using Nautis during the alpha and beta phases. See our Privacy Policy §2.8 for the full visibility scope.

4. Acceptable Use

You agree to use Nautis only for its intended purpose as a digital maritime logbook. You must not:

• Use the App for any unlawful purpose
• Attempt to gain unauthorised access to our systems or other users' data
• Upload content that is offensive, harmful, defamatory, or infringes on others' rights
• Interfere with or disrupt the App's functionality
• Reverse engineer, decompile, or disassemble the App
• Use automated systems (bots, scrapers) to access the App
• Misrepresent your identity or affiliation
• Use the App to transmit malware or harmful code
• Deliberately submit false or misleading log data

5. Your Content

5.1 Ownership

You retain ownership of all content you create in Nautis, including log entries, trip records, photos, notes, and vessel information ("Your Content"). We do not claim ownership of Your Content.

5.2 Licence to Us

By using Nautis, you grant us a limited, non-exclusive, worldwide licence to store, process, and display Your Content solely for the purpose of providing the Nautis service to you. This includes:

• Storing your data on our servers for synchronisation and backup
• Displaying your data to you across your devices
• Displaying Your Content to other Nautis users as part of the public-by-default visibility model (see §9)
• Serving Your Content via On Watch share links that you generate (see §9.3)

This licence terminates when you delete Your Content or your account.

5.3 Responsibility

You are solely responsible for Your Content. You must ensure that any content you upload does not violate these Terms or any applicable laws.

6. GPS Tracking and Location Data

6.1 How GPS Tracking Works

Nautis can track your GPS position during active trips. GPS tracking:

• Is enabled or disabled per trip. You control whether tracking is active
• Operates in the background when enabled, even when the app is minimised or your phone is locked
• Collects position data at regular intervals while a trip is active
• Does not track your location when no trip is active

6.2 Accuracy

GPS accuracy depends on your device, satellite visibility, and environmental conditions. Nautis displays GPS data as received from your device. We do not guarantee the accuracy of any position, speed, or course data. Do not rely on Nautis GPS data for navigation.

6.3 Battery and Data Usage

Background GPS tracking will increase battery consumption and may use mobile data for map tiles. You are responsible for managing your device's battery and data usage.

7. Safety Disclaimers

IMPORTANT SAFETY INFORMATION. PLEASE READ CAREFULLY

7.1 Nautis is NOT a Safety Device

Nautis is a logbook and record-keeping application. It is NOT:

• A navigation aid or chart plotter
• A replacement for proper navigation equipment
• A safety or distress signalling device
• A substitute for a VHF radio, EPIRB, PLB, or AIS
• A replacement for certified maritime safety equipment

7.2 No Reliance for Navigation

Do not rely on Nautis for navigation decisions. Always use proper navigation equipment, up-to-date charts, and follow good seamanship practices. GPS positions shown in Nautis are for logging purposes only.

7.3 Emergency Features

If Nautis includes emergency-related features (such as emergency log entries or safety event recording) in current or future versions:

• These features are for record-keeping purposes only
• They do NOT automatically contact emergency services, the Coastguard, or any rescue organisation
• They do NOT replace proper distress procedures (VHF Channel 16, MAYDAY calls, EPIRB activation)
• We do NOT guarantee that any alert, notification, or message will be delivered
• In an emergency, always use proper maritime distress procedures and contact the relevant Coastguard or rescue service directly

7.4 No Guarantee of Connectivity

Nautis operates offline-first but requires an internet connection for data synchronisation, social features, and notifications. We do not guarantee connectivity at sea. You should never rely on Nautis for any function that requires guaranteed communication.

8. Offline-First Architecture

Nautis is designed to work offline. Your data is stored locally on your device and synced to our servers when an internet connection is available. This means:

• You can create and view logs without an internet connection
• Data may not sync immediately. There may be a delay between creating data and it appearing on our servers
• In the event of a conflict between local and server data, the sync system will attempt to resolve it, but data loss is possible in rare cases
• Local data is lost if you uninstall the app before syncing

9. Public Visibility, Friends, and Sharing

9.1 Public Visibility (default)

Log entries, trips, GPS tracks, photos, and trip records you create in Nautis are publicly visible to other Nautis users by default. This includes display in the in-app feed, on the map, and on your public profile.

During the alpha and beta phases of Nautis, we do not offer per-log or per-trip privacy controls. If you do not want a piece of content to be publicly visible, do not record it in Nautis. You can delete log entries, trips, photos, and your account at any time. Once deleted, content is removed from public visibility immediately, and from our servers within 30 days (see Privacy Policy §7).

You acknowledged this public visibility when you created your account (see §3.5).

9.2 Friends

You can add other Nautis users as friends. The friend graph is used for social discovery and for surfacing relevant activity in the in-app feed. Because all logs and trips are already public by default (see §9.1), adding a friend does not change the visibility of your content. You can remove a friend at any time.

9.3 On Watch Share Links

Nautis includes a feature called On Watch, which generates a public web link for an active trip. Anyone with the link can view the trip in real-time, including position, course, speed, and any log entries made during the trip. The link is not bound to a specific recipient. Anyone with the link, and anyone they forward it to, can open it.

On Watch links remain active during and indefinitely after the trip. On Watch link revocation is on the product roadmap; in the meantime, contact [email protected] to disable a link.

10. Alpha and Beta Status

Nautis is currently in alpha/beta testing.

• The App is provided "as is" during this phase
• You should expect bugs, incomplete features, and potential data issues
• We may reset data, change features, or modify the App significantly during testing
• Alpha/beta access may be revoked at any time
• Feedback provided during testing may be used to improve the App without compensation

We appreciate your patience and feedback during this phase.

11. Intellectual Property

• The Nautis name, logo, and branding are the property of EightTen Labs
• The App's source code, design, and functionality are protected by copyright
• You are granted a limited, non-exclusive, non-transferable licence to use the App for its intended purpose
• This licence does not include the right to modify, distribute, or create derivative works from the App

12. Subscriptions and Payments

Nautis offers free and paid tiers:

• Free tier: Core logbook functionality at no cost. We will never paywall core logging.
• Paid tiers (Nautis Plus, Nautis Pro): Additional features available via subscription. Pricing, features, and billing terms will be communicated clearly before purchase.

Subscription management and billing are handled through the Apple App Store or Google Play Store, subject to their respective terms. Refund requests should be directed to the relevant app store.

13. Limitation of Liability

To the maximum extent permitted by law:

• Nautis is provided "as is" and "as available" without warranties of any kind, express or implied
• We do not warrant that the App will be uninterrupted, error-free, or free of harmful components
• We are not liable for any indirect, incidental, special, consequential, or punitive damages
• Our total liability to you for any claims arising from your use of the App is limited to the amount you have paid us in the 12 months preceding the claim, or £50, whichever is greater

We are not liable for any loss or damage resulting from:

• Reliance on GPS data or any data displayed in the App
• Failure of notifications, alerts, or messages to be delivered
• Data loss due to sync failures, device issues, or service interruptions
• Actions taken or not taken based on information in the App
• Any maritime incident, accident, or emergency

Nothing in these Terms excludes or limits our liability for death or personal injury caused by our negligence, fraud, or any other liability that cannot be excluded by law.

14. Indemnification

You agree to indemnify and hold harmless EightTen Labs from any claims, damages, losses, or expenses (including legal fees) arising from your use of the App, your violation of these Terms, or your violation of any rights of a third party.

15. Termination

• You may stop using Nautis and delete your account at any time
• We may suspend or terminate your access if you violate these Terms
• We may discontinue the App or any feature at any time with reasonable notice
• Upon termination, your licence to use the App ends immediately
• Sections that by their nature should survive termination will survive (including Limitation of Liability, Indemnification, and Intellectual Property)

16. Changes to These Terms

We may update these Terms from time to time. We will notify you of significant changes via the App or by email. Your continued use of the App after changes take effect constitutes acceptance of the updated Terms.

17. Governing Law

These Terms are governed by the laws of England and Wales. Any disputes arising from these Terms or your use of the App will be subject to the exclusive jurisdiction of the courts of England and Wales.

18. Severability

If any provision of these Terms is found to be unenforceable, the remaining provisions will continue in full force and effect.

19. Entire Agreement

These Terms, together with our Privacy Policy, constitute the entire agreement between you and EightTen Labs regarding your use of Nautis.

20. Contact Us

Email: [email protected]
Support: [email protected]
Website: sailnautis.com