Terms of Service

1. Who We Are

Tingyin (听音) is a Mandarin tone-listening trainer. These Terms of Service ("Terms") govern your use of the Tingyin website and apps (the "Service"). The Service is operated by Zava Solutions LLC, a Wyoming limited liability company, trading as Tingyin ("we", "us", "our").

By using the Service you agree to these Terms and to our Privacy Policy. If you do not agree, do not use the Service.

2. The Service

The Service trains you to hear the tones of Mandarin. You hear a syllable and pick the tone you heard. It has four levels: two are free, and two need Premium. You can train without an account; if you do, your progress is stored in that browser on that device only.

3. Your Account and Age

Some parts of the Service require an account. To create one you provide an email address, and you may add a display name and photo. You are responsible for keeping your sign-in credentials confidential and for everything done through your account.

By creating an account you confirm that you are old enough to use an online service like this where you live, or that a parent or guardian has agreed to these Terms on your behalf. You can delete your account at any time; see section 9.

4. Acceptable Use

You agree not to misuse the Service. In particular, do not try to disrupt it, gain unauthorized access to it or to other accounts, scrape it with automated tools, or use it to break the law or harm others.

5. What You Can Buy

Level 1 is free to everyone, and level 2 is free with an account. Levels 3 and 4 — tone sandhi, the neutral tone and the half-third — need Premium, and so does syncing your training progress across the devices you sign in to.

On the web, Premium is sold three ways: $2.49 USD a week, $5.99 USD a month, or $15.99 USD once for lifetime access. The weekly and monthly plans renew automatically until you cancel them. The lifetime purchase is one-time: nothing renews, and there is nothing to cancel. Buying inside the iOS or Android app instead costs $2.99 USD a week, $6.99 USD a month, or $19.99 USD once for lifetime access — higher, because Apple and Google keep a commission we do not otherwise pay. Apple and Google set the store price for your territory; the price shown in the app at the moment of purchase is the amount you are charged.

6. Price and Payment

Prices are shown at checkout, before you pay, and are the amount charged. On the web, payment is processed by Stripe; we never see or store your card details. Inside the iOS or Android app, payment is processed by Apple or Google under their own terms, not Stripe. A weekly or monthly plan renews at the same price at the end of each period until you cancel it. If you bought on the web, cancel any time from your subscription settings; if you bought through the app, cancel from that store's own subscription settings instead. Either way, Premium lasts until the period you have already paid for ends.

7. Refunds and Chargebacks

There is no separate refund policy. Who you ask depends on who took the payment. If you bought on the web, ask us at kubo5922@gmail.com and we refund through Stripe. If you bought inside the iOS or Android app, the store took the payment and only the store can return it: request the refund from Apple or Google. We cannot refund money that never reached us.

However a payment is refunded — by us, by the store, or through a chargeback — Premium ends: levels 3 and 4 lock again and your progress stops syncing across devices. Cancelling a weekly or monthly plan stops the next charge; it does not refund the period you are in.

8. Withdrawal Right (EU, EEA, and UK)

If you are a consumer living in the European Union, the European Economic Area, or the United Kingdom, you have the right to withdraw from the purchase within 14 days of paying, without giving a reason. The 14-day period starts on the day you pay.

If you bought on the web, email kubo5922@gmail.com before the period ends and say that you want to withdraw from the purchase. We will refund the full amount you paid to the payment method you used, and Premium will end. We will send the refund without undue delay and no later than 14 days after you tell us, as consumer law requires.

If you bought inside the iOS or Android app, Apple or Google took the payment and the withdrawal goes to them: request the refund through that store. Tell us as well and we will end Premium on your account, but we cannot return money we did not receive.

9. Account Deletion

You can delete your account at any time from your profile settings. Deleting your account permanently erases your profile, sign-in credentials, and synced learning progress. We keep payment records for accounting, and a record that your address unsubscribed or bounced, so we never email you again. Premium lives on your account, so deleting the account ends it. If you are on a weekly or monthly plan, cancel it before you delete the account so that it does not renew.

10. Availability and Changes to the Service

We work to keep the Service available, but we do not guarantee that it will be available at all times. It may be interrupted for maintenance, updates, or technical problems. We may modify, suspend, or discontinue any part of the Service at any time, with or without notice.

11. Intellectual Property

The Service — including the training corpus, the audio, the design, and the software — is owned by Tingyin and protected by copyright and other intellectual-property law. The audio you hear is computer-synthesized, and the corpus belongs to us. You may use the Service to train your listening, but you may not copy, redistribute, or make derivative works of the Service or its content, except as needed to use it as intended.

12. Disclaimers and Limitation of Liability

The Service is provided "as is" and "as available", without warranties of any kind. We do not warrant that it will meet your needs, be error-free, or run without interruption.

To the maximum extent permitted by law, our total liability for any claim relating to the Service is limited to the amount you paid us, if any. We are not liable for indirect, incidental, or consequential loss. Nothing in these Terms excludes or limits liability that cannot be excluded or limited by law, including any rights you have as a consumer.

13. Governing Law

These Terms are governed by the laws of the State of Wyoming, United States. If you are a consumer in the European Union, the European Economic Area, or the United Kingdom, you also keep the benefit of the mandatory consumer-protection laws of the country where you live.

14. Changes to These Terms

We may update these Terms from time to time. When we do, we will change the "Last Updated" date on this page. Your continued use of the Service after changes take effect means you accept the updated Terms. If you do not agree, stop using the Service.

15. Contact

Questions about these Terms? Contact us at kubo5922@gmail.com.
Zava Solutions LLC, a Wyoming limited liability company, 30 N Gould St Ste N, Sheridan, WY 82801, United States.