Privacy Policy

1. Data we process

• Account data: email, name, profile image, and authentication identifier.
• Study data: video IDs, playback position, saved sentences, edits, and review history.
• Pronunciation data: a short recording is sent for assessment and then discarded; we retain the sentence, scores, and feedback, not the audio file.
• Operational data: cookies, device/browser information, country, referrals, and events.
• Billing references: Paddle customer, transaction, and subscription identifiers. Langxel never receives or stores full card details.

2. Why we use data

We use data to authenticate users, create and synchronize lessons, enforce plan limits, assess pronunciation, provide support, prevent abuse, operate subscriptions, and measure product reliability and learning activation.

3. Service providers and international transfers

We use Supabase for authentication and data, Vercel for hosting and analytics, Microsoft Azure for speech assessment, AI providers through Vercel AI Gateway, YouTube for embedded video, Paddle as merchant of record, and Slack for limited operational alerts. Processing may occur outside your country with the safeguards offered by those providers.

4. Retention and deletion

Account and study records remain while your account is active. Billing and transaction records may be retained for legally required accounting and dispute periods. You may request account deletion; data that must legally be retained is restricted and deleted when that obligation ends.

5. Your choices

You may access and correct account information, delete saved study records, withdraw optional microphone permission, cancel a subscription, or request access, deletion, or objection where applicable. Contact zeronjang@gmail.com.

6. Security and children

We use access controls and restricted server-side database access. No system is perfectly secure. Langxel is not directed to children under 13; users below the applicable digital consent age should use the service only with a parent or guardian.