Biasly Pro

Effective: April 19, 2026 · Last updated: October 1, 2026

This Privacy Policy explains how Biasly collects, uses, and shares information when you use the app.

1. Information We Collect

1.1 You provide

• Account: none is required. When you first use a server feature, the app creates a private guest account identified only by a random user ID. If you choose to link an account in Settings, we also store its email or Apple/Google sign-in identifier (Google sign-in on Android; Apple, Google or email on iPhone).
• Learning preferences: your selected bias (favorite artist/member), Korean proficiency level
• Study inputs: Korean phrases and lyrics you paste for analysis, honorifics-simulator drafts
• Optional feedback and support messages

1.2 Automatically collected

• Subscription state via RevenueCat (entitlement, product ID), keyed to your random user ID. To enforce plan limits, our server asks RevenueCat whether your user ID has an active subscription each time you request an analysis.
• Usage counts: the number of lyric analyses per day, tied to your user ID, used only to enforce the free and Pro daily limits.
• Network abuse protection: a salted one-way hash of your IP address (for IPv6, of its /64 network prefix) with a daily analysis count. We never store the IP address itself; the hash cannot be reversed without our secret salt.
• Crash reports (Apple-level, opt-in)
• Anonymized app version, OS version, device model, coarse locale

1.3 Not collected

• Precise location, contacts, microphone/audio, camera/photos, HealthKit, IDFA, browsing history

2. How We Use Information

• Generate AI-powered lyric analyses, daily study cards, and honorifics coaching
• Personalize learning content to your selected bias and level
• Track your streak and progress
• Process subscription purchases and manage entitlements
• Improve app quality via anonymized aggregate metrics

3. AI and Automated Analysis

To generate analyses, the app sends your pasted text and preference context (level, bias) to Anthropic's Claude API. No personal identifiers (email, user ID) are shared with Anthropic. Analysis results are cached in our database to reduce cost and improve response time. The cache is keyed by the lyric text and level only and is shared across users for identical input; it contains no user ID, artist, song or other information about who submitted it, and it is kept after account deletion. Your personal history (which analyses you ran, the artist/song you typed, favorites) is private to your account.

4. User-Submitted Lyrics

You may paste third-party lyrics, dialogue, or social-media text into Biasly for educational breakdown. Biasly does not distribute, republish, or permanently associate those excerpts with you as a user; our role is limited to providing commentary and language analysis. You are responsible for the content you submit.

5. Third-Party Services

We do not sell your data or share it with advertising networks.

6. Storage and Security

• TLS in transit, encryption at rest on Supabase
• Row-level security: each user accesses only their own records
• API keys held outside version control via Supabase Edge Functions

7. Retention

Account and learning history are retained while your account is active. You can delete your data at any time in the app (Settings → Account → Delete account, or Delete my data for a guest); in-app deletion takes effect immediately, and email requests are completed within 30 days. After deletion we keep only: purchase records required for legal, tax, or fraud-prevention purposes; daily usage counts tied to the random user ID (no lyric content) so that deleting and re-creating an account cannot reset plan limits; the hashed network counters described above; and the shared, anonymous lyric-analysis cache. See Delete your account & data.

8. Your Rights

Depending on your jurisdiction (GDPR, CCPA, PIPA, etc.) you may request access, correction, deletion, export, or restriction of your personal data. Email ootssu@ootssu.com. We respond within 30 days.

9. Children's Privacy

Biasly is not directed to children under 13. Users 13-17 should have a parent or guardian review this policy. We do not knowingly collect personal data from children under 13.

10. International Transfers

Data may be processed in the United States via Supabase, RevenueCat, and Anthropic.

11. Cookies and Tracking

The app does not use cookies, advertising trackers, or IDFA.

12. Changes

Material changes announced via in-app notice or email at least 7 days before taking effect.

13. Contact

Email: ootssu@ootssu.com