Terms of Service

Last updated: April 2026

1. Acceptance of Terms

By accessing or using the Link123 application and services (the "Service"), you agree to be bound by these Terms of Service ("Terms"). If you do not agree to these Terms, you may not use the Service.

We may update these Terms from time to time. We will notify you of material changes by posting the updated Terms on the Service and updating the "Last updated" date. Your continued use of the Service after any changes indicates your acceptance of the new Terms.

2. Description of Service

Link123 is a personal knowledge management and social discovery platform that enables you to:

  • Store, organize, and connect various types of personal content (notes, bookmarks, contacts, media, and more).
  • Build a personal knowledge graph that reveals connections between your information.
  • Discover people with shared interests and complementary knowledge.
  • Communicate with other users through end-to-end encrypted messaging.
  • Protect sensitive content with end-to-end encryption.
  • Use AI-powered tools to create, refine, and transform content.

3. Account Registration

To use the Service, you must create an account. You agree to:

  • Provide accurate and complete registration information.
  • Maintain the security of your account credentials. You are responsible for all activity under your account.
  • Notify us immediately of any unauthorized use of your account.
  • Not create accounts for others without their permission.
  • Not create multiple accounts for deceptive or abusive purposes.

You must be at least 13 years old (or the applicable minimum age in your jurisdiction) to create an account.

4. User Content

4.1 Ownership

You retain full ownership of all content you create, upload, or store on the Service ("User Content"). Link123 does not claim ownership of your content.

4.2 License Grant

By uploading or sharing User Content, you grant Link123 a limited, non-exclusive, worldwide license to store, transmit, and display your content solely for the purpose of operating and providing the Service. For content you choose to encrypt, this license applies only to the encrypted ciphertext (we cannot access the plaintext).

4.3 Content Responsibility

You are solely responsible for your User Content. You represent and warrant that:

  • You have the right to create, upload, and share the content.
  • Your content does not infringe upon the intellectual property or other rights of any third party.
  • Your content complies with all applicable laws and regulations.

5. Acceptable Use

You agree not to use the Service to:

  • Violate any applicable law, regulation, or these Terms.
  • Infringe upon the intellectual property rights of others.
  • Harass, threaten, impersonate, or intimidate other users.
  • Distribute malware, viruses, or other harmful software.
  • Send spam, unsolicited messages, or bulk communications.
  • Attempt to gain unauthorized access to the Service, other accounts, or computer systems.
  • Interfere with or disrupt the Service or servers or networks connected to the Service.
  • Use automated means (bots, scrapers, crawlers) to access the Service without our prior written permission.
  • Upload or distribute content that is illegal, defamatory, obscene, or harmful to minors.
  • Engage in any activity that exploits, harms, or threatens to harm minors.

6. End-to-End Encryption

The Service offers optional end-to-end encryption for your content and messaging. By using E2EE features, you acknowledge that:

  • You are responsible for your encryption keys. Encryption keys are derived from your account credentials and managed on your device. We do not have access to your keys.
  • Data recovery is limited. If you lose access to your account and have no recovery mechanism set up, encrypted content cannot be recovered. We cannot decrypt your data.
  • Encryption is permanent. Once content is encrypted, the E2EE protection cannot be disabled for that content.
  • Legal compliance. E2EE does not exempt you from legal obligations. You remain responsible for ensuring your content complies with applicable laws.

7. AI Features

The Service includes AI-powered features for content creation and assistance. By using AI features, you acknowledge that:

  • AI-generated content may not always be accurate, complete, or appropriate. You are responsible for reviewing and editing AI outputs before use.
  • Content you submit to AI features may be processed by third-party AI service providers under strict data processing agreements.
  • You retain ownership of AI-assisted content you create.
  • AI features are provided "as is" and may be modified, improved, or discontinued.

8. Intellectual Property

The Service, including its design, features, logos, and code (excluding User Content), is the property of Link123 and is protected by copyright, trademark, and other intellectual property laws. You may not copy, modify, distribute, or reverse-engineer any part of the Service without our prior written consent.

"Link123" and the Link123 logo are trademarks of Link123. You may not use our trademarks without prior written permission.

9. Third-Party Services

The Service may integrate with or contain links to third-party services (e.g., cloud storage, AI providers). We are not responsible for the content, privacy practices, or availability of those services. Your use of third-party services is governed by their respective terms and policies.

10. Termination

You may terminate your account at any time through the app settings. Upon termination:

  • Your data will be deleted in accordance with our Privacy Policy.
  • Your encrypted data will be permanently inaccessible once deletion is complete.
  • Shared content that has been forwarded by other users may persist in their accounts.

We may suspend or terminate your account if you violate these Terms, engage in fraudulent or illegal activity, or if required by law. We will provide notice when feasible.

11. Disclaimers

THE SERVICE IS PROVIDED "AS IS" AND "AS AVAILABLE" WITHOUT WARRANTIES OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND NON-INFRINGEMENT.

We do not warrant that the Service will be uninterrupted, error-free, or completely secure. We do not warrant the accuracy or completeness of any content on the Service, including AI-generated content.

12. Limitation of Liability

TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, LINK123, ITS DIRECTORS, EMPLOYEES, PARTNERS, AGENTS, SUPPLIERS, OR AFFILIATES SHALL NOT BE LIABLE FOR ANY INDIRECT, INCIDENTAL, SPECIAL, CONSEQUENTIAL, OR PUNITIVE DAMAGES, INCLUDING WITHOUT LIMITATION, LOSS OF PROFITS, DATA, USE, GOODWILL, OR OTHER INTANGIBLE LOSSES, RESULTING FROM:

  • Your use of or inability to use the Service.
  • Any unauthorized access to or alteration of your transmissions or data.
  • Loss of encrypted data due to lost account credentials.
  • Any third-party conduct on the Service.
  • Any other matter relating to the Service.

13. Indemnification

You agree to indemnify and hold harmless Link123 and its officers, directors, employees, and agents from any claims, damages, losses, liabilities, and expenses (including legal fees) arising out of or related to your use of the Service, your User Content, or your violation of these Terms.

14. Governing Law and Dispute Resolution

These Terms shall be governed by and construed in accordance with applicable law, without regard to conflict of law principles. Any disputes arising from these Terms or the Service shall first be attempted to be resolved through good-faith negotiation. If negotiation fails, disputes shall be resolved through binding arbitration in accordance with established arbitration rules.

15. Severability

If any provision of these Terms is found to be unenforceable or invalid, that provision shall be modified to the minimum extent necessary to make it enforceable, and the remaining provisions shall continue in full force and effect.

16. Entire Agreement

These Terms, together with the Privacy Policy, constitute the entire agreement between you and Link123 regarding your use of the Service and supersede any prior agreements.

17. Contact Us

If you have any questions about these Terms of Service, please contact us: