Hey LinTerms of Use
These terms are an agreement between you and Hey Lin (“we”, “us”), the operator of the Hey Lin app. By using the app, you agree to them. Please also read our Privacy Policy.
1. Who can use Hey Lin
You must be at least 18 years old and an adult where you live. The app runs on iPhone with iOS 26 or later and is not offered in mainland China.
2. Lin is an AI
- Lin is a fictional character. What she says is generated by AI as you talk; she is not a real person and can't truly feel emotions.
- Her replies can be wrong, incomplete or inappropriate. Don't rely on them for important decisions.
- She is not a doctor, therapist, lawyer or financial adviser, and nothing she says is professional, medical, legal or financial advice.
- Hey Lin is not an emergency or crisis service. If you are in danger or thinking about harming yourself, call your local emergency number or a crisis line right away. The app lists helplines under Settings → Mental health helplines; see also our Support page.
3. Acceptable use
When you use Hey Lin, you agree not to:
- use it for anything illegal, or to create or share illegal content;
- try to get sexual content from it, or any content that involves or sexualizes minors;
- use it to harass, threaten or abuse anyone, or to plan harm to yourself or others;
- copy, modify, reverse engineer or decompile the app, or extract its models, artwork or other assets, except where the law expressly allows it;
- get around or interfere with the free trial, the daily limit, App Attest, subscription checks or other protections, or access our server other than through the app;
- resell the service, or send requests by automated means.
Lin is designed to steer away from sexual topics and harmful requests. We may limit or block installations that break these rules.
4. Subscriptions
- New users can use the app free for 10 minutes. The trial needs no payment.
- After that, talking with Lin requires an auto-renewing subscription: $4.99 per month or $29.99 per year in the United States. Prices in other countries and regions are shown in the app before you buy and may differ.
- Payment is charged to your Apple Account when you confirm the purchase. The subscription renews automatically for the same length unless you cancel at least 24 hours before the end of the current period; the renewal is charged within the 24 hours before the period ends.
- You can manage or cancel your subscription in your Apple Account settings (Settings → your name → Subscriptions). Deleting the app doesn't cancel it. Refunds are handled by Apple under its policies.
- A subscription includes up to 3 hours of calls and texting a day in total; the day resets at 4 AM local time. This fair-use limit keeps the price low. A conversation about a crisis is never cut off by the daily limit.
- Songs and dances are included. There's nothing else to buy.
- If prices change, Apple will let you know as required, and you can cancel before the new price applies.
5. Our content and credits
The app, the character of Lin, her artwork, voice, songs and writing, and the rest of the app's content belong to Hey Lin or its licensors and are protected by law. We give you a personal, non-transferable, revocable license to use the app on Apple devices you own or control, for your own non-commercial use, under these terms. The app uses these third-party works:
- 3D model “AvatarSample_U” by pixiv VRoid Project, under the VRM Public License 1.0 (modified)
- Motions from Adobe Mixamo
- Voice model CosyVoice 3, under the Apache License 2.0
- Font Noto Serif SC, under the SIL Open Font License 1.1
6. What you say
What you say and type stays yours. You allow us to process it as described in the Privacy Policy, only to provide the service (writing Lin's replies, tidying her memory, writing her diary) and to review reports. Lin's replies are generated by AI; you may use them for your own personal purposes.
7. Disclaimers
The app is provided “as is” and “as available”. To the extent the law allows, we make no warranties, express or implied, including about fitness for a particular purpose, the accuracy of AI replies or uninterrupted availability. The cloud service may change, pause or end, and features may change over time.
8. Limitation of liability
To the extent the law allows, Hey Lin is not liable for indirect, incidental, special or consequential damages, or for decisions you make based on what Lin says. Our total liability for any claim is limited to what you paid for the app in the 12 months before the claim. Nothing in these terms limits rights you have under consumer protection laws that can't be waived where you live.
9. Ending
You can stop using the app at any time by deleting it and cancelling your subscription in your Apple Account settings. We may suspend or end access for installations that break these terms or misuse the service.
10. Changes
We may update these terms. We'll post the new version here with a new effective date; if you keep using the app after that, the new terms apply.
11. Apple
These terms are between you and us, not Apple. Apple's Licensed Application End User License Agreement (Standard EULA) also applies to your use of the app. Apple has no obligation to provide maintenance or support for the app.
12. Contact
Questions about these terms: support@heylin.app