隐私政策
你的书不上传、不外发，转换全部在这台设备上完成。
1我们收集什么
什么都不收集。具体地说：
- 没有账号。不要求注册、登录，不收集姓名、邮箱、手机号。
- 没有网络请求。App 不发送任何数据到任何服务器，包括我们自己（我们也没有服务器）。
你可以打开飞行模式，全部功能照常工作。 - 没有分析工具。不集成任何第三方统计、崩溃上报、广告 SDK。App 的依赖只有 Apple 自家的
StoreKit（仅用于内购）与系统框架。 - 不读取你的书。转换只读取你主动选中的文件，处理完即写入本机，不解析、不上传其他任何文件。
转换失败时可以点「复制诊断」，那份 JSON 只包含错误码、字节数、格式与环境信息，
书名只给一段哈希值，正文一个字都不出现；是否把它贴给别人，由你决定。
2数据存在哪里
全部在你这台设备的 App 沙盒里：
| 内容 | 位置 | 谁能看到 |
|---|---|---|
| 转换任务记录（文件名、状态、时间） | App 沙盒 Application Support |
只有这台设备上的你 |
| 转换产物（EPUB） | App 沙盒 outbox，直到你存入「图书」 |
同上 |
| 你的偏好（简繁、净化开关、入库去向） | UserDefaults |
同上 |
| Pro 购买状态（一个布尔值） | UserDefaults 缓存 + Apple 的购买凭据 |
缓存给你自己看，凭据在 Apple |
删除 App 会一并删除以上全部本机数据。已存入「图书」的书不受影响——那些归「图书」和你自己管。
3关于内购
「转书 Pro」通过 Apple 的 App Store 完成，我们不接触、也不存储你的支付信息（卡号、账单地址
一概不经过我们，也拿不到）。我们只从 StoreKit 拿到一个「这台设备是否已购买」的判断结果。
Apple 对这笔交易的处理适用 Apple 隐私政策。
4关于分享扩展
你在别的 App 里选「导入到转书」时，扩展只做一件事：把这个文件登记进队列，然后关闭。
它不转换、不读取文件内容、不联网。它和主 App 之间通过 App Group
（group.com.bookext.shared）在本机传递文件路径，不经过网络。
5儿童
本 App 不面向 13 岁以下儿童单独设计，也不收集任何人的信息——包括儿童。
6你的权利
因为我们不收集数据，也就没有「导出我的数据」「删除我的数据」这类请求需要处理。
你想清空一切：删掉 App 即可。想撤销购买记录：在 Apple ID 的购买历史里申请退款。
7政策变更
若未来某个版本真的开始收集数据（例如加上 iCloud 同步），我们会在该版本发布前更新本页，
并在 App 内的更新说明里明确写出收集什么、为什么收集。不会静默变更。
8联系我们
有问题写信到 houlizhong2008@gmail.com。
这个邮箱只用于产品反馈，不构成任何数据收集渠道。
Privacy Policy
Your books are never uploaded or sent anywhere — conversion happens entirely on this device.
1What we collect
Nothing. Specifically:
- No account. No sign-up, no sign-in, no name, email or phone number.
- No network requests. The app sends no data to any server, including ours (we don’t have one).
Turn on Airplane Mode and every feature still works. - No analytics. No third-party analytics, crash reporting or ad SDKs. The only dependencies
are Apple’s own StoreKit (for the in-app purchase) and system frameworks. - We don’t read your books. Conversion reads only the file you explicitly picked, writes the
result locally, and touches nothing else.
If a conversion fails you can tap “Copy Diagnostics”: that JSON contains an error code, byte counts, the
detected format and environment info — the book’s title appears only as a hash, and not a single word
of the body text is included. Whether you share it is up to you.
2Where data lives
All of it inside this device’s app sandbox:
| Item | Location | Who can see it |
|---|---|---|
| Conversion records (filename, state, time) | App sandbox Application Support |
You, on this device |
| Output (EPUB) | App sandbox outbox, until you save it to Books |
Same |
| Preferences (variant, cleanup toggles, save destination) | UserDefaults |
Same |
| Pro purchase state (a single boolean) | UserDefaults cache + Apple’s receipt |
Cache is yours; receipt is Apple’s |
Deleting the app deletes all of the above on-device data. Books you already saved to Books are unaffected —
those belong to Books and to you.
3About the purchase
“BookTurn Pro” is processed by Apple’s App Store. We never see or store your payment details — card numbers
and billing addresses never reach us and we cannot access them. All we get from StoreKit is a yes/no answer
to “has this device purchased Pro”.
Apple’s handling of that transaction is governed by
Apple’s Privacy Policy.
4About the Share Extension
When you choose “Add to BookTurn” in another app, the extension does exactly one thing: it registers the file
into the queue and closes. It does not convert, does not read the file’s contents, and makes no network calls.
It passes a local file path to the main app through an App Group (group.com.bookext.shared) —
never over the network.
5Children
This app is not designed for children under 13, and it collects no one’s information — children included.
6Your rights
Because we collect no data, there are no “export my data” or “delete my data” requests to service.
To clear everything, delete the app. To reverse a purchase, request a refund through your Apple ID
purchase history.
7Changes to this policy
If a future version ever does start collecting data (for example, adding iCloud sync), we will update this
page before that version ships and state plainly in the release notes what is collected and
why. No silent changes.
8Contact
houlizhong2008@gmail.com — for product feedback only; it is not a data
collection channel.