Privacy Policy

Last updated: July 8, 2026

This Privacy Policy explains how TND Studios ("we", "us") handles information in our games, including Mahjong Duel, Polygon Paradise, and our other titles (collectively, the "Games"). Some practices below apply only to certain Games, as noted. By using a Game, you agree to this policy.

Information we collect

We keep data collection to the minimum needed to run each Game. We do not ask for your real name, email address, or phone number to play, and we do not collect precise location, contacts, or photos in any Game.

• Account identifier. Games create an anonymous account with a randomly generated ID when you first play (Mahjong Duel via Google Firebase; Polygon Paradise via Unity Authentication). It is not tied to your real-world identity.
• Profile and gameplay data. A username/nickname you choose and gameplay data (for example, in Mahjong Duel: rating, wins/losses, match results, and friends; in Polygon Paradise: loadout, trophies, and battle/defense logs), stored against your anonymous account.
• Connection data. Technical connection information such as your IP address is processed by our networking and service providers for multiplayer, matchmaking, and fraud prevention.
• Analytics events (Polygon Paradise). Polygon Paradise uses Unity Analytics to collect gameplay events (such as battles played and progression), in-app purchase events (product, price, and currency), and ad-impression events, tied to your anonymous account and a device identifier. We ask for your permission before collecting analytics data; if you decline, no analytics events are collected. These events describe in-game activity only and do not include your real-world identity.
• Advertising identifier (ad-supported Games only). Ad-supported Games (such as Polygon Paradise) use third-party ad networks that may access your device advertising identifier (IDFA on iOS, Advertising ID on Android) and ad-interaction data to serve and measure ads, including ad targeting across apps. Ad-free Games (such as Mahjong Duel) do not include advertising or tracking.

We do not use crash-reporting SDKs. Mahjong Duel does not use analytics SDKs.

How we use information

We use information to operate and improve the Games: to create anonymous accounts, run online play and matchmaking, save progress, maintain leaderboards and rankings, power social features, keep the Games working and secure, and — in ad-supported Games only — to display and measure advertising. We do not sell your personal information.

Advertising and tracking (ad-supported Games)

Ad-supported Games (such as Polygon Paradise) show ads through ironSource LevelPlay (ad mediation) and Unity Ads. These partners may use your device advertising identifier and ad-interaction data to serve and measure ads and for ad targeting across apps.

• On iOS, we ask your permission (App Tracking Transparency) before using your advertising identifier for tracking; change it anytime in Settings → Privacy & Security → Tracking.
• On Android, you can reset or delete your Advertising ID in your device settings.
• Your tracking choice is passed to our ad partners as your consent signal: if you decline, ads are served non-personalized and your advertising identifier is not used for ad targeting or sale/sharing of data.

Ad-free Games (such as Mahjong Duel) do not use advertising or tracking.

Service providers

• Google Firebase — anonymous accounts and database (Mahjong Duel). See the Google Privacy Policy.
• Photon / Exit Games — realtime multiplayer (Mahjong Duel). See the Photon Privacy Policy.
• Unity Gaming Services — anonymous authentication, cloud save, leaderboards, and analytics (Polygon Paradise). See the Unity Privacy Policy.
• ironSource LevelPlay and Unity Ads — advertising in ad-supported Games. See the ironSource Privacy Policy and the Unity Privacy Policy.

Data retention and deletion

We keep your account data while your account exists. Where a Game supports in-app account deletion (such as Mahjong Duel: Settings → Delete account), you can permanently delete your account and its associated data at any time — this removes your profile, username, and friends connections. For other Games, or to request deletion of data tied to your anonymous account, contact us at the address below. Completed match records may be retained in anonymized, aggregate form as part of game history.

Children's privacy

The Games are intended for a general audience and are not directed to children under 13, and we do not knowingly collect personal information from children under 13. If you believe a child has provided information, contact us and we will delete it.

Security

We use reasonable measures to protect your information, but no method of transmission or storage is completely secure.

Changes to this policy

We may update this policy from time to time. We will revise the "Last updated" date above when we do.

Contact

Questions about this policy, or to request data deletion? Contact us at studiostnd@gmail.com.