Terms of Use

1. Who we are

Lanna (the website lannaapp.com, the iOS app and related services, together “Lanna” or the “service”) is provided by:

• Responsible party: Renyer Santos (individual)
• City: São Paulo, Brazil
• Support e-mail: support@lannaapp.com

In these terms, “we” and “Lanna” mean that person, and “you” means anyone who uses the service, as a student, teacher or school representative.

2. Accepting these terms

By creating an account (with e-mail or with Google), you confirm that you have read and agree to these Terms of Use and that you have read the Privacy Policy, which explains how we handle your personal data. We record the date and version of the terms you accepted when you sign up.

If you do not agree with these terms, do not create an account or use the service.

When you buy a paid plan, the conditions shown on the checkout screen (price, billing period and plan features) are also part of this agreement.

3. What Lanna is

Lanna is a language learning platform. With it you can:

• create study materials from a topic generated by artificial intelligence, from your own text, from an audio file (MP3) or from a YouTube video;
• study each material in several modes (listening and reading, pronunciation, writing, voice conversation, chat, exercises, grammar and flash cards), save words and do scheduled reviews;
• as a teacher, create classes, invite students, build lesson plans, send assignments, follow progress, teach with presentations (including live lessons with audio and video, when available), issue certificates and, with the School Plan, unlock the Pro plan for students.

Lanna is a study tool. It is not a school and it does not issue diplomas or official proficiency certifications. Certificates issued by teachers inside Lanna are the responsibility of whoever issues them.

4. Sign-up and account

• To use Lanna you need an account with a valid name and e-mail. The information you give must be true and kept up to date.
• Your account is personal and non-transferable. Do not share your password or let other people use your account. Shared accounts (for example, one account for a whole classroom) are not allowed.
• If you sign in with Google, access depends on your Google account, and your Lanna e-mail is the e-mail of that account.
• You are responsible for what is done with your account. If you notice misuse, change your password and tell us at support@lannaapp.com.
• Creating several accounts to get around the limits of the Free plan is not allowed.

5. Minimum age and use by minors

• 18 or older: may create an account and buy paid plans.
• 13 to 17: may create an account with the permission and supervision of a parent or legal guardian. Only the parent or guardian may buy paid plans.
• Under 13: may only use Lanna inside a class run by a teacher or school that has obtained the specific and prominent consent of at least one parent or legal guardian, as required by article 14 of the Brazilian General Data Protection Law (LGPD). In that case, the teacher or school is responsible for collecting and keeping that consent.

If we learn that a child's account was created without the required consent, we may suspend it and delete the data. Parents and guardians can ask us to do so at support@lannaapp.com.

6. Plans and payment

Lanna has a free plan and paid plans:

• Free: no cost, with limits (for example, number of materials per month and available study modes).
• Pro: a subscription for learners, with the paid features unlocked.
• Teacher: a subscription for teachers, with class and lesson features.
• School Plan: a subscription bought by a teacher or school with a number of seats that unlock the Pro plan for students (section 11).

The features, limits and prices of each plan are the ones shown on the plans pages and at checkout. The amount charged is always the amount shown at the time of purchase, in Brazilian reais (BRL), for the billing period you chose (monthly or yearly). Coupons and discounts apply under the conditions shown with them.

Payments are processed by Stripe, our payment processor, by credit card or, when available, by boleto (Brazilian bank slip). Lanna never receives or stores your full card details. A plan paid by boleto is only unlocked after the bank confirms the payment.

If a free trial is offered, its conditions (length and date of the first charge) are shown before you subscribe, and you can cancel during the trial without being charged.

7. Automatic renewal and prices

• Subscriptions renew automatically at the end of each period (month or year) and are charged to the saved payment method until you cancel.
• The date of the next charge is shown in Account and in the subscription portal.
• If the price of a plan changes, we will tell you by e-mail at least 30 days in advance. The new price only applies from the renewal after that notice, and you can cancel before it at no cost.

8. Cancellation

• You can cancel anytime, with no fee and no minimum term, in Account › Plan › Manage subscription (Stripe's subscription portal). You can also ask us to cancel by e-mail at support@lannaapp.com.
• When you cancel, automatic renewal stops and there are no further charges. You keep the paid plan until the end of the period you already paid for; after that your account returns to the Free plan and your materials stay there, subject to the Free limits.
• Outside the withdrawal period (section 9), cancelling does not refund the current period, except where the law or these terms say otherwise (for example, sections 18 and 19).
• Deleting your account (Account › Danger zone) cancels the subscription immediately and ends access right away. If you are still within the withdrawal period, ask for the refund before deleting the account.

On the yearly plan, there is no pro-rata refund after the withdrawal period, and access continues until the end of the paid year. Exceptional cases, such as a serious service failure, are reviewed by support.

9. Right of withdrawal and refunds

Because you subscribe online, you have the right to withdraw within 7 (seven) days, under article 49 of the Brazilian Consumer Protection Code and Decree 7,962/2013. The period starts on the purchase date or, if the subscription started with a free trial, on the date of the first charge.

How to ask

1. Send an e-mail to support@lannaapp.com from your account e-mail, with the subject “Withdrawal from purchase”. You do not need to give a reason.
2. We confirm receipt of your request immediately (automatic reply) and cancel the subscription.
3. We refund everything you paid, at no cost to you:
   • credit card: we ask Stripe and your card issuer to reverse the charge; the credit shows up on your statement according to the issuer's timeline (usually within two statements);
   • boleto: we refund by bank transfer or Pix to an account in your name that you tell us, within 10 business days.

After the refund, your account returns to the Free plan. The right of withdrawal applies to the first purchase of each plan and to plan changes that create a new charge (for example, from monthly to yearly). For automatic renewals, you can cancel at any time to avoid the next charge (section 8).

10. Failed payments

• If a renewal charge fails, Stripe will retry it for a few days and you will be asked to update your payment method in Account › Manage subscription.
• If the payment is not fixed, the subscription ends and your account returns to the Free plan. Your materials and progress are not deleted because of this.
• A boleto not paid by its due date does not activate the plan and creates no charge.
• We do not charge fees or interest on the Free plan. Amounts owed for periods already used may be collected as permitted by law.

11. School Plan and seats

• With the School Plan, a teacher (or the school they represent) buys a number of seats, at the per-seat price shown at purchase. Whoever buys the plan is responsible for paying for it.
• Each seat unlocks the Pro plan for one student who is in that teacher's classes. The teacher chooses which students get a seat and can remove a seat at any time.
• A student with a seat has Pro while the seat is active. If the seat is removed or the School Plan ends, the student returns to the Free plan (or to their own subscription, if they have one). The student's materials and progress stay in their account.
• The number of seats can be changed in the subscription portal; billing follows the number of seats, under the rules shown when you change it.
• Anyone who buys the School Plan on behalf of an institution confirms they are authorized to do so.

12. Teachers, classes and student data

When a student joins a class, they share with that class's teacher information about their study on Lanna, as described in the Privacy Policy (for example, progress, assignments, answers and mistakes in activities, participation in lessons). Students can leave a class at any time.

Teachers (and schools, where applicable) agree to:

• use student data only for teaching, without selling it, disclosing it or using it for anything else;
• invite only people they are entitled to invite and, for minors, have the permission of their parents or guardians (section 5);
• tell participants before recording a live lesson and have a legal basis for the recording, especially when minors take part;
• treat students and the work they produce with respect, and keep class content appropriate for the students' age;
• not download, export or share student data, recordings or certificates beyond what the lessons require.

About student data:

• Lanna is the controller of all users' account and study data, including students in classes.
• The teacher or school is an independent controller of the student data they obtain or produce through their classes (for example, what they choose to record, export or note down) and is responsible for how they use it.
• Schools that hire Lanna under their own contract may sign a data processing agreement in which Lanna acts as processor for that school's class data.

Breaching this section may lead to the suspension of the teacher's classes or account (section 19).

13. Referral program

• Teachers can refer students with the referral link or coupon shown in the Referrals area. A student who uses the coupon may get the discount shown with it.
• The teacher who referred the student (the first one to refer them) earns a commission on the amounts actually paid for that student's Pro subscription, at the percentage shown in the Referrals area, while the subscription is active and paid.
• No commission is due on amounts that are refunded, reversed or disputed, nor in cases of fraud, self-referral or referral of fake accounts.
• Commissions are paid manually by Lanna, in the way and at the frequency communicated to the teacher. Teachers are responsible for any taxes on what they receive.
• The program does not create an employment relationship, partnership or agency between the teacher and Lanna.
• We may change or end the program with at least 30 days' notice. Commissions on payments made before the change remain due.

14. Your content

“Your content” is everything you create, upload or import on Lanna: texts, audio, video links, voice recordings, answers, messages, presentations, announcements, logos and class materials.

• It stays yours. You keep the rights to your content.
• License to run the service. So that Lanna can work, you give us a free, non-exclusive, worldwide license to store, copy, process and adapt your content (for example, to generate audio, translations, exercises, transcripts and images from it) and to show it to you and to the people you share it with (such as the students in a class). This license exists only to provide the service and ends when the content is deleted, except for copies you have already shared with students, which stay in their accounts.
• Responsibility for what you import. You confirm that you have the right to use the content you upload or import, including texts, audio files and YouTube videos, and that this use respects copyright law (in Brazil, Law 9,610/1998) and the terms of the platforms it comes from. Lanna does not review imported content in advance.
• Removal. We may remove content that breaches these terms or third-party rights. If you believe content on Lanna infringes your rights, write to support@lannaapp.com identifying the content and the right infringed.
• Suggestions. If you send us suggestions about Lanna, we may use them freely to improve the service, with no obligation to pay you.

15. Acceptable use

When using Lanna, you may not:

• publish or generate content that is illegal, discriminatory, hateful, harassing, violent, sexually explicit or that involves the exploitation of children and teenagers;
• infringe copyright, trademarks, privacy or other third-party rights;
• impersonate someone else or use other people's data without authorization;
• send spam, viruses or malicious code, or try to access other people's accounts, classes or data;
• copy, scrape, resell or sublicense the service, or reverse engineer the software, except where the law allows it;
• overload the service, get around usage or plan limits, or use unauthorized automation;
• use the artificial intelligence features to produce content forbidden by these terms or by the AI providers' policies;
• use student data for anything other than teaching.

16. Artificial intelligence

Many Lanna features use third-party artificial intelligence models to generate sentences, translations, exercises, corrections, chat replies, pronunciation scores, synthetic voice, transcripts and images. The providers are listed in the Privacy Policy.

• AI can make mistakes. Generated content may contain grammar, translation, pronunciation or factual errors, and scores and corrections are automatic estimates. Double-check anything important, ideally with a teacher.
• Lanna does not guarantee learning results or success in exams or certifications.
• Generated images are illustrations and do not depict real people.
• Do not include sensitive personal data (health, religion, sexual orientation, ID documents, etc.) in your texts, messages or recordings.
• The models and providers we use may change to improve the quality or cost of the service.
• If an automatic assessment affects your interests (for example, a score in an assignment), you can ask the class teacher or us to review it.

17. Lanna's intellectual property

The Lanna brand, software, design, texts and materials created by us (such as sample materials and lessons) belong to us or our licensors and are protected by law. You receive a personal, limited, non-exclusive and revocable license to use Lanna under these terms. This gives you no rights to the brand or the software.

Third-party content shown on Lanna (for example, YouTube videos) belongs to its respective owners.

18. Availability and changes to the service

• We work to keep Lanna available and secure, but there may be interruptions for maintenance, supplier failures, internet problems or events beyond our control.
• We may improve, change or remove features. If a change removes an essential feature from a paid plan you already bought, we will give you reasonable notice and you may cancel and receive a pro-rata refund for the unused period.
• Features labelled “beta” or in testing may change or end at any time.

19. Suspension and termination

• By you: you can delete your account at any time in Account › Danger zone. Deleting it cancels your subscription and deletes or anonymizes your data, as explained in the Privacy Policy. It cannot be undone.
• By us: we may suspend or close accounts, classes or content that breach these terms or the law. Whenever possible we will warn you first and give you the chance to fix or explain it. In serious cases (illegal content, fraud, risk to children and teenagers, attacks on the service), suspension may be immediate.
• If we close a paid account without you having breached these terms, we will refund the pro-rata amount for the unused period.

20. Liability

• We are liable for the services we provide under the Brazilian Consumer Protection Code. Nothing in these terms removes rights the law gives you as a consumer.
• We are not responsible for content created, uploaded or imported by users, nor for how teachers, schools or other users use information outside Lanna.
• We are not responsible for failures caused by acts of God or force majeure, by the sole fault of third parties or of the user, nor for third-party services you choose to use together with Lanna (for example, YouTube).
• When you use Lanna as a professional or business (for example, a school on the School Plan) and not as an end consumer, and to the extent permitted by law, our total liability is limited to the amount you paid Lanna in the 12 months before the event, and we are not liable for lost profits or indirect damages.

21. Communications

We may send you e-mails and in-app notifications about your account, security, payments and classes (essential messages), and also study reminders, tips and news (optional messages). Optional messages can be turned off in Account › Preferences or with the “Unsubscribe” link in each e-mail. Essential messages keep coming while the account exists.

22. Changes to these terms

We may update these terms to reflect changes in the service or in the law. When a change is significant, we will tell you by e-mail or in the app at least 15 days in advance, explaining what changed. If you do not agree, you can cancel your subscription and delete your account before the change takes effect. Continuing to use Lanna after that date means you accept the new version. The version and date are always at the top of this page.

23. Governing law and venue

These terms are governed by the laws of the Federative Republic of Brazil.

If you are a consumer, you may bring a claim in the courts of your place of residence, as guaranteed by article 101, I, of the Brazilian Consumer Protection Code. In all other cases, the courts of São Paulo, Brazil, are chosen.

Before going to court, we suggest talking to us through the support e-mail. In Brazil you can also file a complaint on consumidor.gov.br or with your local Procon.

24. Support and contact

Our support is provided by e-mail at support@lannaapp.com and through the Help page. We reply within 5 (five) days. Cancellation and withdrawal requests are acknowledged immediately.

25. General provisions

• These terms, the Privacy Policy and the conditions shown at checkout are the entire agreement between you and Lanna about the service.
• If any section is found invalid, the others remain in force.
• If we do not enforce a rule in one case, that does not mean we have given it up.
• We may transfer this agreement in the event of a corporate reorganization, merger or sale of the business, keeping your rights. We will let you know.
• These terms are written in Portuguese. If this translation differs from the Portuguese version, the Portuguese version prevails.