Privacy Policy
Last updated: 2026-08-15
1. Provider and app
- App name: Shamisen Score ("the App").
- Provider: su3-hokkaido
- Contact: su3.hokkaido.2210@gmail.com
2. Information we handle and why
The App handles only the minimum information needed.
| Data | Source | Purpose | Recipient |
|---|---|---|---|
| Sign-in identifier (Apple/Google) | Sign in with Apple / Google Sign-In (only if you purchase/restore) | To link your purchased Pro entitlement to your account and restore it after reinstall/device change | Our backend (Cloudflare). We store only a key derived from the identifier, not your name or email body |
| Purchase / receipt data | App Store / Google Play | To verify purchases and grant the Pro entitlement (server-side verification) | Apple / Google verification APIs and our backend |
- The App uses no advertising or tracking SDKs and does not provide behavioral data to third parties.
3. Third-party services
- Authentication: Apple / Google (if you sign in).
- Billing: Apple App Store / Google Play.
- Backend: Cloudflare (Workers / D1 / R2).
Each service follows its own privacy policy.
4. Retention and deletion
- Our server stores only a key derived from your sign-in identifier and your entitlement records.
- To request account/data deletion, contact us at the address above. After verifying your request, we delete the derived key and entitlement records held on our backend.
5. Children's privacy
- The App is not directed at a specific age group and is not primarily intended for children under 13.
6. Changes
- We may update this policy. Significant changes will be announced in-app or on the store listing.