SERENIO
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    Terms

    Terms of Service

    The agreement between you and Serenio when you use our apps and website.

    These Terms of Service ("Terms") are an agreement between you and Serenio AI Limited, a company incorporated in Hong Kong (company no. 3299059) ("Serenio", "we", "us"). They apply to the Serenio app for iPhone, the Serenio web app and this website (together, the "Services"). By creating an account or using the Services, you agree to these Terms and to our Privacy Policy. If you don't agree, please don't use the Services.

    Please read this first

    • Yuyu is an AI. Serenio's companion is artificial intelligence, not a human being.
    • Serenio is not medical care. It is a wellbeing companion. It is not a medical device, and it doesn't provide medical, psychological or other professional advice, diagnosis or treatment.
    • Serenio is not an emergency service. No one monitors conversations. If you are in danger or thinking about harming yourself, call 999 in Hong Kong or your local emergency number, or contact a helpline straight away.
    • Serenio is for adults aged 18 and over.

    1. Eligibility and your account

    • You must be at least 18 years old to use the Services.
    • Most features need an account. Give accurate information when you sign up, keep your password safe, and tell us promptly if you think someone else has used your account. You are responsible for what happens under your account.

    2. Free for individuals

    • The Services are free for individuals, for personal and non-commercial use. There are no subscriptions or in-app purchases.
    • To keep Serenio sustainable and safe for everyone, we set fair-use limits, such as a daily number of replies. We show these limits in the app and may change them.
    • An organization that wants to provide Serenio to its staff, students, members or clients needs a separate written partnership agreement with us, which involves fees. You may not use the Services to provide a service to others without such an agreement.
    • If we ever introduce paid features for individuals, we will tell you clearly beforehand, and nothing will be charged without your agreement.

    3. What Serenio is, and isn't

    • Serenio uses AI to offer conversation, reflection and self-help practices adapted from established psychological approaches. They are for general wellbeing and self-reflection.
    • Serenio does not provide medical, psychological, psychiatric or other professional advice, diagnosis or treatment. The check-in uses standard questionnaires (PHQ-9 and GAD-7), but its results are not a diagnosis.
    • Always seek the advice of a qualified professional about any health condition, and never ignore or delay professional advice because of something you read or heard in Serenio.
    • Serenio is not a crisis or emergency service and cannot send help to you. Support lines shown in Serenio are run by independent organizations.

    4. AI-generated content

    • Yuyu's replies, reflections, insights, letters and other content are generated automatically by AI. They may be inaccurate, incomplete or unsuitable for your situation.
    • Use your own judgement. Don't rely on AI-generated content for decisions about your health, safety, finances or legal matters.
    • Yuyu draws only on what you share with it and what it was designed to do. It doesn't know you the way a person does.

    5. Your content

    • You keep ownership of what you write, say and upload ("Your Content").
    • You give us a worldwide, non-exclusive, royalty-free licence to host, store, process, transmit and display Your Content only as needed to provide the Services to you, as described in our Privacy Policy. This licence ends when you delete Your Content or your account, except for copies in routine backups until they expire.
    • You are responsible for Your Content and confirm that you have the right to share it. Please don't share other people's sensitive personal information without good reason.

    6. Acceptable use

    You agree not to:

    • use the Services in a way that breaks the law or harms anyone;
    • try to break, overload or get around the Services' security, limits or safety features;
    • copy, reverse engineer or decompile the Services, except where the law allows it;
    • use bots, scrapers or other automated means to access the Services or extract data or AI outputs;
    • use the Services to build or train a competing product or AI model;
    • use the Services to harass or threaten anyone, or to create content that sexualizes or endangers children;
    • impersonate anyone or misrepresent your connection with anyone; or
    • use the Services commercially without our written agreement.

    If we reasonably believe these Terms have been broken, we may take appropriate action, including suspending or closing an account.

    7. Our intellectual property

    The Services, including the software, design, the Serenio name and logo, and Yuyu, belong to Serenio or its licensors. We grant you a personal, limited, non-exclusive, non-transferable and revocable licence to use the Services for personal, non-commercial purposes under these Terms. If you send us feedback or ideas, we may use them freely and without obligation to you.

    8. Privacy

    Our Privacy Policy explains how we handle personal data, including how the AI processes your conversations and which providers help us.

    9. Third-party services

    The Services rely on third-party providers, such as AI model providers and hosting services, and link to third-party services such as helplines. We are not responsible for third-party services that we don't control.

    10. Apple App Store

    If you downloaded the Serenio app from Apple's App Store, the following also applies:

    • On the App Store, the app may be listed under our founder's developer account. Serenio AI Limited provides the app and is the party to these Terms.
    • These Terms are between you and Serenio only, not Apple, and Apple is not responsible for the app or its content.
    • Apple has no obligation to provide maintenance or support for the app.
    • If the app fails to conform to an applicable warranty, you may notify Apple, and Apple may refund the purchase price, if any. To the maximum extent permitted by law, Apple has no other warranty obligation for the app.
    • Apple is not responsible for addressing any claim by you or a third party relating to the app or your use of it, including product liability claims, claims that the app fails to meet legal or regulatory requirements, and consumer protection or privacy claims.
    • Apple is not responsible for investigating, defending, settling or discharging any third-party claim that the app infringes intellectual property rights.
    • You confirm that you are not located in a country subject to a U.S. Government embargo or designated as a "terrorist supporting" country, and that you are not on any U.S. Government list of prohibited or restricted parties.
    • You must comply with applicable third-party terms when using the app, and with the Usage Rules in Apple's Media Services Terms and Conditions.
    • Apple and its subsidiaries are third-party beneficiaries of these Terms and may enforce them against you.
    • Please send any questions, complaints or claims about the app to Serenio AI Limited at support@serenio.ai.

    11. Changes to the Services

    We keep improving Serenio, so features may change, be added or be removed. We may also suspend or discontinue all or part of the Services. If we discontinue the Services, we will try to give you reasonable notice and a way to download your data.

    12. Ending your use

    You can stop using Serenio and delete your account at any time from inside the app. We may suspend or close your account if you break these Terms, if the law requires it, or to protect you, other people or the Services. Sections that by their nature should continue (including sections 4, 5, 7 and 13 to 16) survive after your use ends.

    13. Disclaimers

    The Services are provided "as is" and "as available". To the maximum extent permitted by law, we make no warranties of any kind, express or implied, including that the Services will be uninterrupted, error-free or fit for a particular purpose, or that AI-generated content will be accurate.

    14. Limitation of liability

    To the maximum extent permitted by law, we are not liable for any indirect, incidental, special, consequential or punitive damages, or for any loss of data, profits or goodwill, arising from your use of the Services. Because the Services are free for individuals, our total liability to you for all claims relating to the Services is limited to HK$800.

    Nothing in these Terms excludes or limits liability that cannot be excluded or limited by law, including liability for death or personal injury caused by negligence, or for fraud, and nothing affects your statutory rights as a consumer.

    15. Governing law and disputes

    These Terms are governed by the laws of the Hong Kong Special Administrative Region. The courts of Hong Kong have jurisdiction over any dispute, although if you are a consumer living elsewhere, you may also have the right to bring a claim in your local courts under mandatory local law. Before going to court, please contact us so we can try to resolve the issue informally.

    16. General

    If any part of these Terms is found to be unenforceable, the rest remains in effect. If we don't enforce a right, that isn't a waiver of it. You may not transfer your rights under these Terms without our consent; we may transfer ours as part of a reorganization, merger or sale. These Terms and our Privacy Policy are the entire agreement between you and us about the Services. If versions of these Terms in different languages conflict, the English version prevails.

    17. Changes to these Terms

    We may update these Terms. We'll post the new version here with a new date and, for material changes, tell you in the app or by email before they take effect. If you keep using Serenio after the changes take effect, you accept the updated Terms. If you don't agree, please stop using Serenio and delete your account.

    18. Contact

    Serenio AI Limited, Hong Kong (company no. 3299059). Email support@serenio.ai.

    Last updated: 28 September 2026