Privacy Policy for Stack Pact: Co-op Blocks
Effective date: August 15, 2026
Stack Pact: Co-op Blocks (also localized as Stack Pact: 方块同盟) is provided by Xiaojian Zhao at no cost and is intended for use as is.
Information the app processes
Stack Pact does not include advertising or analytics SDKs, does not track users, and does not send personal information or gameplay data to a server operated by the developer.
The app processes limited information only to provide its features:
- On-device preferences and progress. Presentation, sound, haptic, accessibility, operation-tip, and guided-practice settings are stored locally on the device.
- Nearby multiplayer. When a user chooses Play Nearby, the device name and real-time gameplay messages are shared directly with the nearby devices that join the session. This information is used only to discover, display, and operate the nearby game. It is not sent to or retained by the developer.
- Game Center multiplayer. If a user chooses Play Online, Apple Game Center handles authentication, invitations, matchmaking, and real-time transport. During a match, the app temporarily associates gameplay content with the participating Game Center player identity so it can operate and synchronize the shared board. The developer does not operate a game server and does not receive or retain this information.
Stack Pact does not use this information for advertising, marketing, analytics, profiling, or tracking, and does not sell it to data brokers.
Apple services
Game Center is an Apple service. Information processed by Apple is governed by Apple's privacy policy and the user's Apple Account and Game Center settings. You can review Apple's privacy policy.
Retention and deletion
The developer does not retain multiplayer identities or gameplay content on a developer-operated server. Real-time session information is discarded when the session ends. Local preferences and guided-practice progress remain on the device until the app is deleted or the device storage is otherwise cleared.
Children
The developer does not knowingly collect personal information from children. The data practices described in this policy apply to all users. Parents and guardians can manage Game Center access and multiplayer features through Apple's device and family controls.
Security
Stack Pact uses Apple's platform networking and Game Center frameworks for multiplayer communication. No method of electronic transmission is completely secure, but the app limits transmitted information to what is needed to provide the selected multiplayer session.
Changes to this policy
This policy may be updated when the app's features or data practices change. The effective date at the top of this page will be revised when an update is published.
Contact
If you have questions or suggestions about this privacy policy, contact zhaoxiaojian@hotmail.com.
Stack Pact：方块同盟隐私政策
生效日期：2026 年 8 月 15 日
Stack Pact: Co-op Blocks（简体中文名称为 Stack Pact: 方块同盟）由赵晓健免费提供，并按现状供用户使用。
本应用处理的信息
Stack Pact 不包含广告或分析 SDK，不跟踪用户，也不会将个人信息或游戏数据发送到开发者运营的服务器。
本应用只为提供功能而处理以下有限信息：
- 设备上的偏好与进度。画面、声音、触觉反馈、辅助功能、操作提示和引导练习设置仅保存在设备本地。
- 附近联机。当用户选择“附近联机”时，设备名称和实时游戏消息会直接发送给加入同一局游戏的附近设备。这些信息仅用于发现、显示和运行附近游戏，不会发送给开发者，也不会由开发者保留。
- Game Center 联机。当用户选择“在线游戏”时，Apple Game Center 负责身份验证、邀请、匹配和实时传输。游戏过程中，本应用会暂时将游戏内容与参与者的 Game Center 玩家身份关联，以运行并同步共享棋盘。开发者不运营游戏服务器，也不会接收或保留这些信息。
Stack Pact 不会将这些信息用于广告、营销、分析、用户画像或跟踪，也不会将其出售给数据经纪商。
Apple 服务
Game Center 是 Apple 提供的服务。Apple 对信息的处理受 Apple 隐私政策以及用户的 Apple 账户和 Game Center 设置约束。请参阅 Apple 隐私政策。
保留与删除
开发者不会在开发者运营的服务器上保留多人游戏身份或游戏内容。实时会话信息会在会话结束后丢弃。本地偏好和引导练习进度会保留在设备上，直至应用被删除或设备存储被清除。
儿童隐私
开发者不会故意收集儿童的个人信息。本政策所述的数据处理方式适用于所有用户。家长和监护人可以通过 Apple 的设备与家庭控制管理 Game Center 访问和多人游戏功能。
安全
Stack Pact 使用 Apple 的系统网络和 Game Center 框架进行多人通信。任何电子传输方式都无法保证绝对安全，但本应用会将传输的信息限制在提供用户所选多人会话所必需的范围内。
政策变更
当应用功能或数据处理方式发生变化时，本政策可能会更新。更新发布时，页面顶部的生效日期也会相应修改。
联系方式
如果您对本隐私政策有任何问题或建议，请联系 zhaoxiaojian@hotmail.com。