Effective date: July 7, 2026
MandarinAI ("we," "our," or "us") operates the Mandarin-learning platform at mandarin-ai.com. This Privacy Policy explains, in plain language, what information we collect, why we collect it, who processes it on our behalf, and the choices you have. We collect only what we need to run the service — nothing more.
When you create an account with your email address, we store your name (if you provide one), email address, and a hashed password. When you sign in with Google, we receive your name, email address, and profile picture from your Google account instead (see section 3 below).
To make spaced repetition work, we record your study activity:
Payments are handled by Polar, our merchant of record. We store only your subscription status (which plan you are on and whether it is active). We never see or store your card number or other payment details.
We send transactional emails — account verification, password reset, and trial notices — through Cloudflare's Email Service. We do not send marketing emails without your consent.
We use essential cookies to keep you signed in (session cookies). We do not currently run third-party advertising trackers on the site.
If you choose to sign in with Google, we receive your name, email address, and profile picture from your Google account. Here is exactly how we handle that data:
MandarinAI's use and transfer of information received from Google APIs adheres to the Google API Services User Data Policy, including the Limited Use requirements.
We use the information above to:
We do not sell your personal information. We share data only with the following providers, each of which processes it on our behalf to run the service:
We may also disclose information when required by law, or in connection with a merger or acquisition (in which case this policy continues to apply to your data).
We keep your account and learning data for as long as your account exists, because your review history is what makes spaced repetition work. You can delete your account yourself at any time from your account settings (Account → Delete Account). Deleting your account immediately cancels any active subscription and signs you out everywhere, and your account is deactivated right away. For 30 days afterwards you can restore it — with all of your data intact — using the link we email you when you delete. After those 30 days, your personal and learning data (including your review history, study sessions, and saved stories) are permanently erased and cannot be recovered. If you would rather we do it for you, email us at support@mandarinai.com or use our contact page. Either way, we may retain the limited records we are legally required to keep (for example, billing records).
All traffic to mandarin-ai.com is encrypted with TLS. Passwords are stored hashed, never in plain text. Access to production data is limited to what is needed to operate the service. No method of transmission or storage is 100% secure, but we work to protect your information against unauthorized access, alteration, disclosure, or destruction.
Depending on where you live, you may have the right to:
To exercise any of these rights, email support@mandarinai.com. We respond to all requests, typically within 30 days.
Our service is not directed at children under 13, and we do not knowingly collect personal information from children under 13. If we learn that we have, we will delete it.
Our infrastructure runs in the United States (application hosting and database), so your information may be processed outside your own country. Where required, we rely on appropriate safeguards for such transfers.
We may update this Privacy Policy from time to time. We will post any changes on this page and update the effective date above. For material changes, we will also notify you by email or in the app.
Questions about this policy or your data? Email us at support@mandarinai.com or use our contact page. We typically respond within 24 hours.