Privacy Policy — Coin Bazaar: Smart Change 🪙

Last updated: 8 August 2026

Coin Bazaar does not collect, store, transmit, or share any personal information. It is a solo, two-player (same-device), and vs-computer educational maths game — children pay market prices with the fewest coins and discover recursion and dynamic programming along the way — 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.

In-app purchase

The game is free and offers one optional, one-time in-app purchase (an unlock for the solo Busy Bazaar, Tricky Coins & Count-the-Ways challenges), placed behind a parental gate. The purchase is processed entirely by Apple's App Store or Google Play using your existing store account; the app itself receives and stores no payment or personal information — only an on-device note that the unlock is owned, so it keeps working offline. There are no ads, no subscriptions, and no consumable purchases.

Network & third parties

Gameplay makes no network connections and the app contains no third-party SDKs, advertising, trackers, or external links. All fonts and artwork are bundled, so the game works fully offline (for example, in airplane mode). The only network use is the optional purchase/restore described above, handled by the platform store when you choose to use it.

Data storage

Everything the game remembers stays on your device and contains no personal information: your chosen language, whether sound is on, your star total and the goods stocked on your market stall, and a flag recording that the optional unlock was purchased. The puzzle itself (the price ladder, which prices you have paid, whose turn it is, the timer) exists only in memory while you play and is discarded when the app closes. None of it ever leaves your device.

Children's privacy

Coin Bazaar is suitable for children. Because it collects no data and contains no ads, external links, or communication features — and any purchase requires passing a parental gate — 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, or need help? Email htphuc.cs@gmail.com or visit our support page. You can also open an issue at github.com/htphuc1994/mathduel-site.