app-policies

Privacy Policy — Stone Knights

Last updated: August 13, 2026 / Version: 3

The Japanese version of this policy is the authoritative (governing) version. If there is any conflict or discrepancy between this translation and the Japanese version, the Japanese version controls. 日本語版はこちら

This policy is a general template and has not been reviewed by a lawyer. Before any release beyond internal TestFlight distribution, please confirm that its content matches the App’s actual implementation and operation, consulting a professional if needed.

1. Introduction

Stone Knights (“the App”) is a board game in which players move stones against each other. This policy explains what information is collected when you use the App and how it is handled.

2. Information the App Collects

Information stored only on your device

The stones, coins, shards, and achievements you own, your deck configuration, and your settings (BGM/SE on or off) are stored only on your device (PlayerPrefs). This information is never transmitted externally and is deleted when you uninstall the App.

The App does not collect any personally identifying information such as your name, email address, phone number, or address. No account registration (entering an email address or password) is required.

Information collected for online matches (Unity Gaming Services)

The online match feature uses Unity Gaming Services (UGS), provided by Unity Technologies.

• Anonymous authentication: When you use online matches, an anonymous player ID (an identifier not linked to personal information such as an email address) is issued for your device.
• Relayed communication: Communication with your opponent is relayed through UGS Relay. Information about the moves played is exchanged between the two matched devices through this relay.
• Match record storage (Cloud Save): To detect abuse through intentional stalling (repeated timeouts or abandoned connections), the number and timestamps of matches ended due to stalling are recorded in UGS Cloud Save, linked to your anonymous player ID. The developer can view this record from the Unity Dashboard, and online match access may be restricted if a threshold is exceeded (see the Terms of Service for details).

Crash and error information

The App does not include any crash-reporting mechanism. Unity Cloud Diagnostics (crash reporting), Unity Analytics, and Firebase Crashlytics are all disabled. If an unexpected error occurs, the details are shown on the device’s screen only and are never transmitted off the device.

However, if you have enabled both “Share iPhone Analytics” and “Share with App Developers” under iOS Settings > Privacy & Security > Analytics & Improvements, Apple may collect crash and usage information and make it available to us in anonymised, aggregated form through App Store Connect. This is provided by Apple’s own mechanism and is not collected directly by us. You can turn it off at any time from that same settings screen.

This information is processed by Unity Technologies. Please also review Unity Gaming Services’ privacy policy.

Information collected for advertising (Google AdMob)

The App includes a rewarded video ad that lets you earn coins by watching it. Ads are never shown automatically — they are shown only when you tap the ad icon (a treasure-chest icon) and choose to watch. Ads are served using the Google Mobile Ads SDK (AdMob), provided by Google.

Before the ad SDK is initialized, the App requests consent through Google’s User Messaging Platform (UMP) where required by law (e.g. in the EEA), and on iOS it asks for permission through App Tracking Transparency.

• If you grant permission, identifiers such as an advertising ID may be sent to Google for ad delivery and measurement.
• If you do not grant permission, no processing based on those identifiers takes place, and ads are served in a non-personalized form instead. Either way, you can watch an ad and receive the reward.

For details on the information collected, please see Google’s Privacy Policy and Google Mobile Ads’ App Store data disclosure.

3. What the App Does Not Use

• Usage analytics and crash collection such as Firebase Analytics / Crashlytics — not included (see “Crash and error information” above)
• In-app purchases — not included

4. Purpose of Use

• On-device data is used only for the App’s operation (saving and restoring progress)
• Information sent to UGS is used only to establish online match connections and to detect and prevent stalling abuse
• Information related to advertising is used only to serve the rewarded ad and measure its effectiveness

5. Disclosure to Third Parties

The information described in Section 2 is processed by Unity Technologies (UGS) and Google (Google Mobile Ads), each under its own privacy policy. No information is disclosed to any third party other than the above.

6. Children’s Privacy

The App is not directed at children under 13. We do not knowingly collect information from children under 13.

7. Changes to This Policy

If this policy is changed, this page and the version number shown in the App will be updated. When the version changes, the App will ask you to re-consent the next time it starts.

8. Contact

For questions about this policy, please contact:

Contact: gendaijin44435@gmail.com