Welcome to Yozi AI. These terms are an agreement between you and the operator of Yozi AI ("the operator", "we" or "us"; see section 12) covering your use of the Yozi AI desktop app, mobile app and website (together, "the service").
Please read these terms carefully, especially the parts in bold that exclude or limit liability or set where disputes are heard. By accepting, signing up or using the service, you confirm that you have read and agree to these terms and the Privacy Policy. Users under 14 need a parent or guardian to read and accept them; users aged 14 to 17 should read them under a parent's or guardian's guidance. If you do not agree, do not use the service.
1. The service
Yozi is an AI study coach for students. It:
builds your study profile through conversation;
plans daily practice and review from the study records you have saved;
teaches with knowledge cards, practice cards, guided writing cards and summary cards;
brings together your weak points, personal sentence and collocation bank and progress towards your goal.
Yozi currently offers guided writing for the postgraduate entrance exam in English, covering the short and long essays of English I and English II, with fixed collocations, short translations, long and difficult sentences and paragraph-by-paragraph writing. You can also upload your own material and study around it. New subjects will be announced on the service pages when they open.
Where you can use it:
The desktop app and the mobile app are the main ways to use Yozi. With sync on, your study records sync across your devices.
The website offers app downloads, product information, account sign-in and a read-only view of your own synced progress. Sign up in the app.
Supported system versions for each platform are as listed on the download page.
Some features, such as studying on your device and viewing your history, need no sign-in. Cloud sync needs one.
2. Your account
When you sign up, give a real email address you control and complete the verification. Each account is for one person only.
Keep your account password and API key safe, and do not lend, transfer or sell your account. You bear any loss caused by your own poor safekeeping or disclosure. If someone else uses your account, change your password at once and contact us.
Do not sign up in another person's name, or access anyone else's account or study records without permission.
If you break section 4, we may, depending on the circumstances, warn you, limit features, or suspend or close your account, keep records as the law requires and report to the authorities.
You can request account deletion under section 7 of the Privacy Policy, with a 7-day cooling-off period. Once deleted, your account and cloud data are deleted or anonymised and cannot be restored.
3. AI connections and third-party model services
The service's AI features use, by default, a model service you connect yourself. You register with the provider, get an API key and pay for usage yourself, and you must follow that provider's terms of service. The provider is responsible for its charges, quotas, available models, outages and the way it handles your content.
We forward only what the current task needs to the provider you choose, on your instruction, and cap the number, duration and cost of each call.
Available models are whatever the provider returns live. If your current model is unavailable, we tell you so you can switch. We never move you to another provider or a paid model on our own.
The services you can connect, and where your data goes, are set out in section 2, item 4 of the Privacy Policy.
If we later offer model credits supplied by the platform, the credit rules will be as described on the relevant page at that time, and section 7 of these terms will apply.
4. Acceptable use
You must not use the service to:
create, copy, publish or spread information prohibited by laws and regulations, including content that endangers national security, incites subversion of state power, undermines ethnic unity, promotes terrorism or extremism, violence, obscenity or pornography, or false and harmful information;
infringe anyone's lawful rights, such as rights in their likeness, reputation, privacy, personal information or intellectual property, or upload material you have no right to use;
cheat in exams, sit an exam or write work for someone else, or submit AI-generated content to an exam or assessment body as your own original work;
attack or disrupt the service, bypass authentication, authorisation or limits on count and cost, or register accounts in bulk or scrape the service automatically;
use someone else's API key or an endpoint address you are not authorised to use;
resell or rent out the service, or use it to provide paid services to others;
remove, alter or hide the labels the service puts on AI-generated content. When you publish or share AI-generated content, you must disclose it as the rules require and keep the labels;
do anything else that breaks laws and regulations, public order and good morals, or these terms.
If we find illegal content, we will stop generating and transmitting it, remove it, keep records and report it to the authorities as the law requires. You can file complaints and reports through the contact details in section 12.
5. AI-generated content and study results
AI explanations, questions, corrections and suggestions are generated automatically by models and may be inaccurate, incomplete or out of step with the latest exam requirements. The service labels AI-generated content in the interface. “AI-generated” appears next to conversation replies and knowledge cards. Writing feedback is labelled “AI assessment”. Shared study images that include assessments retain the assessment label. Please read and make sure you understand these labels.
AI content supports your learning. It does not replace a teacher, and it is not an official answer, official score or exam result. Writing feedback is labelled "AI assessment", and practice levels are not exam scores.
We make no promises about exam scores, score gains or admission results. Check anything important against the official exam syllabus, past papers and reliable sources.
If you find AI content that is wrong or inappropriate, you can correct it in the conversation or tell us.
6. Intellectual property and your content
The intellectual property in the service's software, interface, brand marks and the teaching content we create belongs to the operator or the relevant rights holders. Open-source components used in the service are governed by their own licences, and the related source code is provided as those licences require.
The material you upload and the essays and answers you write remain yours or the original rights holder's. You authorise us to store and process this content to the extent needed to provide the service, and to send it to the model provider you choose on your instruction. We do not publish your content, add it to a public question bank or use it to train models.
Make sure the material you upload does not infringe anyone's rights. Anyone who believes content in the service infringes their rights can contact us, and we will handle it as the law requires.
Public questions and reference material are used according to their source and licence. Being able to access something does not give you permission to redistribute it.
7. Paid services
The following terms apply to paid services you actually purchase:
Before you buy, we will show the service, price, validity period and usage rules prominently on the page.
If we offer automatic renewal, we will make that prominent when you sign up and remind you prominently 5 days before each charge. You can cancel renewal at any time.
Refunds follow the law and the rules published on the purchase page.
Charges for your own API are billed to you by the provider. They are not a paid service under this section, and we do not refund them.
8. Changes, interruptions and termination
We may change or interrupt parts of the service for upgrades, maintenance or business reasons, and will try to give notice in the app or on the website first. Paid services are handled under section 7 and the law.
Provider failures, network outages or device problems may make AI features temporarily unavailable. Export or sync your study records regularly.
If we decide to stop running the service, we will announce it 30 days in advance and leave time for you to export your study records.
You can stop using the service and delete your account at any time.
9. Limitation of liability
To the extent the law allows, we are not liable for loss caused by:
the services, charges or outages of the model provider you choose, or the way it handles your content;
your own poor safekeeping, breach of these terms or unlawful use;
force majeure, and events beyond our reasonable control such as telecom or network failures and hacking. If such an event occurs, we will do our best to limit the loss and restore the service.
We are liable as the law provides for property loss caused by our intentional misconduct or gross negligence, and for personal injury. These terms do not exclude or limit that liability, or any rights you have as a consumer under the law.
10. Notices
We send notices through in-app messages, pop-ups, website announcements or your registered email. In-app notices and website announcements count as delivered on the day they are published, and emails on the day they are sent.
11. Governing law and disputes
These terms are governed by the laws of the People's Republic of China (for these terms, excluding the laws of the Hong Kong and Macao Special Administrative Regions and the Taiwan region).
Both sides will first try to settle any dispute arising from these terms through friendly negotiation. If that fails, either side may sue in a people's court with jurisdiction where the operator is domiciled.
12. Updates and contact
When these terms change, we publish the new version in the app and on the website. For changes that significantly affect your rights, we will tell you prominently, for example with a pop-up, and you can decline and stop using the service. For other changes, continuing to use the service after they take effect means you accept them.
If any provision of these terms is held invalid, the rest remain in force.
