Privacy policy

1. Who we are

Nihao School is a Mandarin pronunciation app operated by Pogorelskikh Kseniia, a private individual based in Paraćin, Serbia.

Privacy questions and requests: sekih0907@gmail.com.

2. What we collect

• Account data: your email address, the one-time sign-in codes we send, and the session cookie that keeps you signed in. Nihao School has no passwords.
• Practice data: the lessons you start and finish, your answers and how long you take, practice summaries, and the analysis of a speaking take (pitch measurements and whether the take was judged).
• Product events: first-party usage events such as opening the app, starting a lesson or viewing the membership page. They carry no free text and no audio.
• Consent choices: your confirmation that you are 18 or older and the optional settings under Data and privacy.
• Membership data: your subscription status, plan and the end of the paid period. Card and payment details go directly to Paddle; we never receive them.

3. Microphone and recordings

Nihao School asks for microphone access only when you start a speaking take. Your recording is analysed on your device, and the audio is not uploaded to our servers. The analysis, such as your pitch over time and whether the take was judged, is saved with your practice attempt.

You can refuse or revoke microphone permission in your browser. Speaking practice cannot record without it.

4. How we use your data

We use the data described above to:

• run the lessons and keep your progress across your devices;
• sign you in by email code;
• manage memberships and open the paid lessons when a subscription is active;
• understand which parts of the course are used and fix problems;
• keep the service secure and prevent abuse; and
• meet our legal obligations.

We do not sell personal data and we do not use third-party advertising or analytics trackers.

5. Who processes data for us

Paddle processes payments as the merchant of record and receives the data needed for your subscription. Postmark delivers email and receives your email address and the sign-in message. The app and its database run on servers we operate.

We may also disclose data if the law requires it or if it is necessary to protect the service and its users.

6. How long we keep data

Account and practice data are kept while your account exists. Product events are deleted after 180 days. When you delete your account in Profile, we delete your account, progress, attempts, summaries, events and consent records. Paddle keeps transaction records under its own policies and legal obligations.

7. Your choices and rights

• Delete your account at any time in Profile.
• Change or withdraw the optional consents under Data and privacy.
• Ask for a copy, correction or deletion of your data by emailing sekih0907@gmail.com.
• Complain to your local data-protection authority.

8. Children

Nihao School is for people aged 18 and over. We do not knowingly collect personal data from children. If you believe a child has created an account, email sekih0907@gmail.com and we will delete it.

9. Cookies and local storage

We use a session cookie to keep you signed in. The app also stores lesson data, queued practice and cached audio on your device so it can work offline. You can clear this storage in your browser; practice that has not synced is then lost.

10. Changes to this policy

If this policy changes, we update the date at the top of the page. For a material change, we will tell you in the app or by email before it takes effect.

11. Contact

Contact Pogorelskikh Kseniia at sekih0907@gmail.com.