CHAINFANG
Privacy Policy
Last updated: 13 October 2026
This policy explains what information Chainfang (the "Game") collects, why, and the choices you have. The Game is published by LumenGuardian LLC ("we", "us"), based in Arkansas, USA. Contact us any time at support@lumenguardian.com.
What we collect and why
| Information | Why | Who handles it |
|---|---|---|
| Game data: your progress, items, settings and player name | To run the Game. It is stored on your device. | Your device, plus a cloud copy stored with an anonymous account ID so you can restore it (Google Firebase). |
| Account details (only if you link a Google account, or use Sign in with Apple on iPhone): that account's email address and account ID. With Sign in with Apple you can choose Hide My Email, and we only receive a private relay address | To keep your cloud save under that account and restore it on a new phone. Linking is optional. | Google Firebase Authentication, and Apple for Sign in with Apple. |
| Advertising data: advertising ID, IP address and approximate location derived from it, device and app information, and how you interact with ads | To show and measure the optional rewarded ads, and to prevent ad fraud. Personalized ads are shown only where allowed and, in regions that require it, only with your consent. On iPhone, the advertising identifier is used only if you allow it when the Game asks (Apple's App Tracking Transparency). | Google AdMob. See how Google uses information from apps that use its services. |
| Analytics and crash reports (when enabled): which features you use, session length, device model and OS, and crash diagnostics, linked to a random app-instance ID | To understand how the Game is played, balance it and fix crashes. | Google Firebase Analytics and Crashlytics. You can switch analytics off in Settings. |
| Purchase data: what you bought, when, and a transaction ID | To deliver purchases, restore them and prevent fraud. We never see your card or payment details. | Google Play or the Apple App Store, and RevenueCat (when enabled) to verify receipts. |
| Support messages: your email address and what you send us | To answer you. | Us. |
We do not ask for your real name, contacts, photos or precise location, and we do not sell your personal information for money.
Legal bases (EEA, UK and Switzerland)
We process your information to provide the Game you asked for (performance of a contract); with your consent for personalized advertising and, where the law requires it, for analytics; for our legitimate interests in keeping the Game secure, preventing fraud and improving it; and where the law requires us to (legal obligation). You can withdraw consent at any time without affecting processing that happened before.
Your choices
- Ad privacy choices: if you are in the EEA, UK, Switzerland or a US state with privacy laws, the Game shows Google's consent message the first time you play. Change your choice any time in Settings → Privacy & support → Ad privacy choices.
- Device settings: you can reset your advertising ID or opt out of ad personalization in your phone's settings (Android: Settings → Privacy → Ads; iOS: Settings → Privacy & Security → Tracking).
- Sign in with Apple: you can stop using it with Chainfang at any time in iPhone Settings → your name → Sign-In & Security → Sign in with Apple. Deleting your data in the Game also revokes it.
- Analytics: turn off Share gameplay analytics in Settings.
- Delete your data: use Settings → Delete my data, or see chainfang.app/delete.
Your rights
Depending on where you live, you may have the right to access, correct, delete or receive a copy of your information, to restrict or object to how we use it, and to withdraw consent. Residents of California and other US states with privacy laws may also opt out of the "sharing" of personal information for cross-context behavioral advertising (use Ad privacy choices or your device's ad settings), and will not be discriminated against for exercising their rights. To make a request, email support@lumenguardian.com. We may need to verify the request. In the EEA or UK you can also complain to your local data protection authority.
Retention
Game data stays on your device until you delete it or uninstall the Game (your phone's own backup may keep a copy). Cloud saves and accounts are kept while your account is active; deleting your data in the Game removes them right away, and an email request within 30 days. Analytics data is kept for up to 14 months. Purchase records are kept for as long as tax and accounting law requires (typically up to 7 years). Support emails are kept for up to 2 years. Our partners keep data under their own policies.
International transfers
Our service providers may process information outside your country, including in the United States. Where required, transfers are covered by appropriate safeguards such as the European Commission's Standard Contractual Clauses.
Children
The Game is not directed at children under 13, and we do not knowingly collect personal information from them. If you are under the age of digital consent in your country, please play only with a parent's or guardian's permission. If you believe a child has given us information, contact us and we will delete it.
Security
We use reasonable technical and organizational measures to protect information, but no method of storage or transmission is completely secure.
Changes
We will post changes here and update the date above. If a change is significant, we will tell you in the Game.
Contact
LumenGuardian LLC, Arkansas, USA · support@lumenguardian.com