Privacy Policy — Sansū: Origami Numbers 🕊️

Last updated: 1 August 2026

Sansū: Origami Numbers does not collect, store, transmit, or share any personal information. It is a solo, two-player (same-device), and vs-computer educational number puzzle that runs entirely offline on your device.

Information we collect

None. The app has no accounts, no sign-in, and no analytics. It does not request your name, email, contacts, location, photos, identifiers, or any other personal data.

Purchase

Sansū is a paid app: you buy it once from the App Store or Google Play using your existing store account. The purchase is handled entirely by Apple or Google; the app itself receives and stores no payment or personal information. There are no in-app purchases, no subscriptions, and no ads.

Network & third parties

The game makes no network connections and contains no third-party SDKs, advertising, trackers, or external links. All artwork and fonts are bundled, so it works fully offline (for example, in airplane mode).

Data storage

Game state (the grid, cage clues, each player's score, whose turn it is, the timer) exists only in memory while you play and is discarded when the app closes. Your chosen language and sound setting are saved on-device (in local storage) only so the app remembers your preference next time; they contain no personal information and never leave your device.

Children's privacy

Sansū is suitable for children. Because it collects no data and contains no ads, external links, or communication features, it does not knowingly collect information from anyone, including children under 13.

Changes to this policy

If this policy ever changes, the updated version will be posted at this URL.

Contact

Questions about this policy? Open an issue at github.com/htphuc1994/mathduel-site.