1.1 "Software" means the YOY AI Agent desktop application, including all executable files, bundled resources, on-device models, local components, installers, patches, updates, documentation and any accompanying materials made available by YOY AI Limited.
1.2 "Licensor", "we", "us", "our" means YOY AI Limited, a company incorporated in the Hong Kong Special Administrative Region.
1.3 "You", "your", "End User" means the individual person installing or using the Software on a device they own or control.
1.4 "Device" means a computer or virtual machine owned or controlled by you on which you install the Software.
1.5 "Your Data" means files, prompts, documents, memories, knowledge-base content and other materials you supply to or generate within the Software.
1.6 "Third-Party Components" means software, libraries, models and tools created by parties other than the Licensor that are included in, bundled with, or optionally used by the Software, as listed on our Licences page.
2.1 Grant. Subject to your compliance with this EULA and the Terms and Conditions, the Licensor grants you a personal, limited, non-exclusive, non-transferable, non-sublicensable, revocable licence to:
2.2 No Fee. The licence granted in Section 2.1 is currently provided at no charge. Sections 13 (Fees, Billing & Beta) of the Terms and Conditions govern any future charges, and we will provide notice before any charge applies to you.
2.3 Your Own Credentials. The Software operates with third-party AI models and services using credentials you supply ("Bring Your Own Key"). You are solely responsible for obtaining those credentials, for the fees charged by those providers, and for complying with their terms. The Licensor is not a party to your agreement with any model provider.
Except to the extent expressly permitted by applicable law that cannot be excluded or restricted by agreement, you must not:
A breach of this Section 3 is a material breach of this EULA and may result in immediate termination under Section 11.
4.1 Ownership. The Software is licensed, not sold. The Licensor and its licensors retain all right, title, and interest in and to the Software, including all intellectual property rights, source code, algorithms, model architectures, the DCI memory system, user interface designs, documentation, and branding. No rights are granted to you other than those expressly stated in Section 2.
4.2 Trademarks. "YOY", "YOY AI", "YOY AI Agent" and "You Own Your AI" are trademarks of YOY AI Limited, registered or applied for in the Hong Kong SAR, Australia, the European Union and the People's Republic of China, together with any other jurisdictions where protection is sought. You acquire no rights in these marks. You may not use them without our prior written consent, save for accurate, non-misleading descriptive references.
4.3 Your Data remains yours. The Licensor claims no ownership over Your Data. Your Data is processed on your Device and stored under your control. Sections 11.2, 11.3 and 12 of the Terms and Conditions and our Privacy Policy govern how Your Data is handled.
4.4 Feedback. If you provide suggestions or feedback, you grant the Licensor a perpetual, worldwide, royalty-free licence to use it without obligation to you.
5.1 Included Components. The Software includes Third-Party Components distributed under their own licence terms, including certain copyleft components licensed under the GNU General Public License and GNU Lesser General Public License. A complete list, with applicable licence terms, is published at yoyai.io/licenses and shipped with the Software as THIRD-PARTY-NOTICES.txt.
5.2 Source Code Offer for Copyleft Components. Where a bundled component is licensed under a copyleft licence that requires source disclosure, you may obtain the corresponding source code by written request to support@yoyai.io. We will provide it within a reasonable period and for a period of at least three (3) years from the date you received the Software.
5.3 No Effect on Our Code. Third-Party Components are integrated as separate, independently-operating libraries or external programs. Nothing on our Licences page, and no licence term of any Third-Party Component, grants you any rights in the Licensor's proprietary code, or requires the Licensor to disclose it.
5.4 Optional External Programs. The Software may detect and optionally work with separately-installed third-party applications (for example, productivity, creative, or CAD software). Such programs are not distributed, bundled, or licensed by the Licensor. You are responsible for obtaining and licensing them yourself.
6.1 Automatic Updates. The Software may download and install updates automatically to keep it secure and functional. As described in Section 9 of the Terms and Conditions, automatic updates are compulsory, and you may not disable, block, or circumvent them.
6.2 Effect of Updates. Updates may add, change, or remove features, and may update this EULA or the Terms and Conditions. Continued use of the Software after an update constitutes acceptance of the updated terms. If you do not accept an update, your remedy is to stop using the Software and uninstall it.
6.3 Version Support. The Licensor is not obliged to provide support, bug fixes, or compatibility updates for any specific version, or to maintain compatibility with any third-party service that changes its own interfaces.
7.1 On-Device by Design. The Software performs memory, semantic search, knowledge-base indexing, and certain speech and language functions locally on your Device. Files and memories processed through these local features are not transmitted to the Licensor.
7.2 External Transfers. Where you use a third-party AI model or online service, the content you submit for that operation is transmitted to that provider using your credentials. Those transfers are governed by the provider's terms and your arrangement with them.
7.3 Anonymous Install Telemetry. The Software sends limited, non-personal diagnostic information (such as operating system, version, hardware capability and region) to help us maintain reliability. It does not include the content of your conversations, your files, or personal identifiers. You may opt out in Settings at any time. Our Privacy Policy describes this in full.
7.4 Backup. You are responsible for backing up Your Data, your Device, and any third-party credentials you use with the Software.
8.1 No warranty of accuracy. The Software uses generative and probabilistic AI models. Output may be inaccurate, incomplete, biased, outdated, or unsuitable for your purpose. You must review and verify all output before relying or acting on it. Sections 6 (AI Output Disclaimer) and 7 (Agentic AI & Autonomous Actions) of the Terms and Conditions apply.
8.2 Your responsibility for actions taken. The Software can act on your Device and in third-party software when you grant permission — including file operations, shell commands, browser automation, application control, and scheduled or looped tasks. You are solely responsible for configuring permissions, supervising operations, and for the consequences of any action the Software performs. We strongly recommend you retain backups and review any action before it executes in a critical environment.
8.3 Professional advice. The Software does not provide legal, medical, financial, tax, accounting, engineering, architectural, or other professional advice. Output must not be treated as a substitute for advice from a qualified professional.
9.1 Support is provided on a reasonable-efforts basis to support@yoyai.io. No service level, response time, or availability commitment is given unless separately agreed in writing.
9.2 The Licensor may discontinue the Software, any feature, or any third-party integration at any time. Where reasonably practicable, we will give notice.
10.1 You represent and warrant that: (a) you are not located in, organized under the laws of, or ordinarily resident in any country or territory subject to comprehensive trade sanctions; (b) you are not identified on any applicable restricted-party, denied-persons, or sanctions list; and (c) you will not use, export, re-export, or transfer the Software in violation of applicable export control or sanctions laws.
10.2 You must not use the Software to facilitate transactions, payments, or transfers involving sanctioned persons or prohibited end-uses.
11.1 This EULA takes effect when you install or use the Software and continues until terminated.
11.2 Termination by you. You may terminate at any time by uninstalling the Software and ceasing all use.
11.3 Termination by us. We may suspend or terminate this licence immediately, with or without notice, if you materially breach this EULA or the Terms and Conditions, including any breach of Section 3 (Licence Restrictions) or the Acceptable Use Policy, or if we are required to do so by law or by a third-party platform.
11.4 Effect of termination. On termination, your licence ends and you must cease all use and delete all copies of the Software. Sections 3, 4, 5, 7, 8, 10, 12, 13, 14 and 15 survive termination.
12.1 You agree that a breach of Section 3 (Licence Restrictions), Section 4 (Ownership), or Section 5 may cause the Licensor irreparable harm for which monetary damages would be an inadequate remedy.
12.2 Accordingly, the Licensor is entitled to seek injunctive relief, specific performance, and other equitable remedies in any court of competent jurisdiction, in addition to any other remedies available at law or in equity, without the need to post a bond or other security and without proving actual damages.
12.3 The Licensor expressly reserves, and does not waive, any and all rights and remedies available to it under the laws of the Hong Kong SAR and of any other jurisdiction in which you are located or hold assets, including the right to enforce its intellectual property and contractual rights worldwide.
14.1 Section 15 (Limitation of Liability) of the Terms and Conditions applies in full to the Software and to this EULA, including its exclusions of indirect, incidental, special, consequential, exemplary and punitive damages, and its aggregate liability cap. That Section is incorporated into this EULA by reference.
14.2 Some jurisdictions do not allow the exclusion of certain warranties or the limitation of certain damages. In such jurisdictions, the exclusions and limitations apply to the maximum extent permitted, and nothing in this EULA limits any non-excludable statutory rights you may have.
You agree to defend, indemnify and hold harmless the Licensor and its affiliates, directors, officers, employees, contractors, agents, suppliers and licensors from and against any claims, damages, liabilities, costs and expenses (including reasonable legal fees) arising from: (a) your use or misuse of the Software; (b) your breach of this EULA, the Terms and Conditions, or applicable law; (c) actions taken by the Software on your Device or in third-party software while operating under permissions you granted; (d) Your Data or the content you process; or (e) your violation of any third party's rights. Section 16 (Indemnification) of the Terms and Conditions applies in full.
16.1 Governing law. This EULA is governed by and construed in accordance with the laws of the Hong Kong Special Administrative Region of the People's Republic of China, without regard to conflict of laws principles.
16.2 Dispute resolution. Sections 18 (Governing Law & Jurisdiction) and 19 (Dispute Resolution & Arbitration) of the Terms and Conditions apply in full to this EULA, including the good-faith negotiation period, binding arbitration administered by the Hong Kong International Arbitration Centre (HKIAC), the class-action waiver, and the Licensor's right to bring proceedings in any court of competent jurisdiction.
16.3 Mandatory local rights. Nothing in this EULA excludes any consumer right that cannot lawfully be excluded in your country of residence.
17.1 Entire agreement. This EULA, together with the Terms and Conditions, the Privacy Policy and the Licences page, constitutes the entire agreement between you and the Licensor regarding the Software, and supersedes any prior agreement on that subject.
17.2 Severability. If any provision is held unenforceable, it will be modified to the minimum extent necessary, or severed, and the remaining provisions continue in full force.
17.3 No waiver. Our failure to enforce any provision is not a waiver of it unless acknowledged by us in writing.
17.4 Assignment. You may not assign this EULA without our prior written consent. We may assign it in connection with a merger, acquisition, restructure, or sale of assets.
17.5 No agency. Nothing in this EULA creates a partnership, joint venture, agency, or employment relationship.
17.6 Language. This EULA is drafted in English. Any translation is provided for convenience only; the English version prevails.
17.7 Third-party rights. Except for the Licensor's affiliates and licensors, no person who is not a party has any right to enforce any provision of this EULA.
YOY AI Limited
Rm 819, 8/F Peninsula Centre
67 Mody Road, TST East
Kowloon, Hong Kong SAR
Email: support@yoyai.io | Web: yoyai.io
YOY AI Limited | End User Licence Agreement v1.0 | Effective 14th September 2026 | support@yoyai.io
Registered in Hong Kong SAR | Company incorporated under the Companies Ordinance (Cap. 622)
© 2026 YOY AI Limited. All rights reserved. YOY, YOY AI, YOY AI Agent and "You Own Your AI" are trademarks of YOY AI Limited.