隐私政策.
最后更新：2026 年 7 月 1 日
sudoku 从设计之初就把隐私放在第一位。我们不收集任何能识别你的个人信息，App 也无需账号。
唯一会联网的，是你主动使用的「AI 教练」——下面说清它发送什么、不发送什么。
我们不做什么
- 不收集个人信息——不收集你的姓名、邮箱、位置或设备标识等任何可识别身份的信息。
- 不追踪——没有统计分析、广告标识符或任何第三方追踪工具。
- 不需要账号——无需注册、登录或邮箱即可使用全部功能。
- 本地优先——对局进度、设置、记录与存档都保存在你的设备本地；若你开启 iCloud，仅在你自己的设备之间同步，由 Apple 加密处理，我们无从访问。
AI 教练（唯一的联网功能）
「AI 教练」是一项可选的付费功能。只有当你主动点击它、请求某一步的讲解时，App 才会联网：
- 这时 App 会把当前这道题的盘面（数字与候选数——纯粹是数独本身，不含任何关于你的信息）发送到我们的服务器，再由它转发给第三方 AI 服务商 DeepSeek，用来生成这一步的通俗讲解。
- 请求中不附带你的姓名、账号、设备标识或任何身份信息；我们的服务器只做转发，不保存这些内容。
- 这部分数据由该 AI 服务商按其自身隐私政策处理。
- 若你在「自定义」模式中填入自己的 API，盘面会改为发送到你指定的服务商，而非我们的。
- 离线 / 标准模式完全不联网，不发送任何数据。
关于购买
App 本身免费。可选的 Pro（永久解锁，或年度订阅）通过 Apple App Store 购买，支付与订阅完全由 Apple 处理，
我们看不到、也不会保存你的任何支付信息。该交易适用 Apple 的隐私政策。
关于儿童
除上述 AI 教练发送的盘面数据外，App 不向任何人收集个人信息，儿童亦然。
联系我们
如对本政策有任何疑问，请联系：bing2002czy@gmail.com
Privacy Policy
Last updated: July 1, 2026
sudoku was built privacy-first. We collect no information that identifies you, and the app needs no account.
The only feature that uses the network is the optional AI Coach — below is exactly what it sends and doesn't.
What we don't do
- No personal data — we don't collect your name, email, location, or any device identifier that could identify you.
- No tracking — no analytics, no advertising identifiers, no third-party trackers.
- No accounts — no sign-up, login, or email required to use every feature.
- Local-first — your game progress, settings, records, and saved puzzles stay on your device; if you enable iCloud, they sync only between your own devices, encrypted by Apple and inaccessible to us.
AI Coach (the only networked feature)
The AI Coach is an optional, paid feature. The app only goes online when you actively tap it to ask for a hint on a move:
- It sends the current puzzle's board (the digits and candidates — just the sudoku itself, containing nothing about you) to our server, which relays it to a third-party AI provider, DeepSeek, solely to generate the plain-language explanation of that step.
- The request carries no name, account, device identifier, or any identity; our server only relays it and does not store it.
- That data is processed by the AI provider under its own privacy policy.
- If you use “Custom” mode with your own API key, the board is sent to the provider you configured instead of ours.
- Offline / Standard mode uses no network and sends nothing.
Purchases
The app is free. The optional Pro (a one-time unlock, or a yearly subscription) is purchased through the Apple App Store.
Payment and subscriptions are handled entirely by Apple, and we never see or store your payment information.
That transaction is governed by Apple's privacy policy.
Children
Apart from the board data sent by the AI Coach above, the app collects no personal information from anyone, children included.
Contact
Questions about this policy? Email bing2002czy@gmail.com