1. Information stored on your devices

The app stores the period dates, flow, symptoms and severity, mood, notes, cycle preferences, questionnaire answers, and reminders you choose to enter. Predictions and statistics are calculated from information on your device. iPhone is the main source of records; the paired Apple Watch exchanges records and settings with it. After the first sync, supported Watch entries can be saved offline and sent when the connection is available.

The widget can display a reference date when you enable date display. Dates are hidden by default and when the iPhone app lock is enabled. The iPhone app lock does not lock the separate Apple Watch app; protect your Watch with its own passcode.

2. Optional Apple Health access

• Write sync: if you enable it and grant permission, Period writes actual period days and menstrual flow to Apple Health, including eligible existing history. It does not write predictions, mood, symptoms, or notes. Records imported from Apple Health are not written back as new periods.
• Import: if you choose the import feature and grant read permission, Period reads menstrual flow records from Apple Health. You review and select eligible records before saving them in the app. It does not automatically import in the background or read unrelated Health categories.

You can manage permissions in Apple Health or system settings. Turning write sync off does not remove records already written to Apple Health. Imported app records and their original Health records are separate copies.

3. Notifications and app lock

With notification permission, the device schedules local reminders for an upcoming period or a daily entry. Notification visibility depends on your system settings. You can turn reminders off in the app or revoke notification permission.

Optional app lock uses the system's Face ID, Touch ID, or device passcode authentication. Period does not receive your biometric data or passcode.

4. Purchases, exports, and backups

Apple processes purchases and payments. The app uses purchase status to enable Pro features and does not receive payment card details.

Exports, reports, and JSON backups can contain sensitive period records, daily observations, settings, and any notes you include. You choose where to save or share them. App lock does not protect copies outside the app. Device backups may include app data depending on your Apple settings. We cannot access or recover your personal device backups.

5. Editing and deleting records

You can edit or delete records, or use “Clear all data” in My to clear the local record document, including period history, daily observations, and cycle settings. Updated records reach the paired Watch when it next syncs; the new data generation prevents old pending Watch commands from restoring cleared records.

When Health write sync is enabled, permission and Pro access remain available, the app also reconciles edits and deletions for records it wrote to Apple Health. This may not finish if sync is disabled, permission is removed, or an error occurs. Check and manage Health copies in Apple Health separately; the app does not delete source records written by other apps.

Exported files, recipients' copies, system backups, purchase history, and device-local privacy preferences are managed separately. Clearing app records does not delete those copies or cancel a subscription.

6. This website and support email

These pages do not request or upload period records and do not include advertising or analytics scripts. A language choice you make is saved locally in your browser. The hosting provider, Cloudflare, processes technical request information, such as IP addresses, to deliver and secure the pages; see Cloudflare's privacy policy.

If you contact support, we use your email address and the information you send to respond to your request. Please do not send complete health backups, period history, passwords, or payment details unless specific information is necessary and you choose to provide it.

7. Scope and contact

Predictions are references only. Period is not a contraceptive method and does not provide medical diagnosis or treatment. Changes to this policy will be published here with an updated date.

For privacy questions, email liyong.bj@hotmail.com.

1. 保存在设备上的信息

应用保存你主动填写的经期日期、经量、症状及程度、心情、备注、周期偏好、问卷回答和提醒设置。预测与统计根据设备上的信息计算。iPhone 是主要数据源，与配对的 Apple Watch 交换记录和设置。完成首次同步后，手表支持的记录可离线保存，恢复连接后再发送。

你开启日期显示后，小组件可以显示参考日期；默认隐藏日期，开启 iPhone 应用锁时也会隐藏。iPhone 的应用锁不会锁定独立的 Apple Watch 应用，请为手表设置设备密码。

2. 可选的苹果健康访问

• 写入同步：你开启并授权后，经期会把实际经期日期和经量写入苹果健康，包括符合条件的已有历史。不会写入预测日期、心情、症状或备注。从苹果健康导入的经期不会作为新记录重复写回。
• 导入：你主动使用导入功能并授予读取权限后，经期会读取苹果健康中的月经流量记录。你预览并选择符合条件的记录后，才会保存到应用。不会在后台自动导入，也不读取无关的健康类别。

你可以在苹果健康或系统设置中管理权限。关闭写入同步不会删除已写入苹果健康的记录。导入后的应用记录与原来的健康记录是两份独立的数据。

3. 通知与应用锁

获得通知权限后，设备会安排经期将至或每日记录的本地提醒。通知在锁定屏幕上的显示方式取决于系统设置。你可以在应用中关闭提醒，或撤销通知权限。

可选的应用锁通过系统面容 ID、触控 ID 或设备密码进行验证。经期无法获取你的生物识别数据或设备密码。

4. 购买、导出与备份

购买和付款由 Apple 处理。应用根据购买状态开放 Pro 功能，不会获取银行卡信息。

导出文件、报告和 JSON 备份可能包含敏感的经期记录、每日感受、设置及你选择包含的备注，由你决定保存或分享位置。应用锁不会保护应用外的文件副本。系统可能根据你的 Apple 设置备份应用数据，开发者无法访问或恢复你的个人设备备份。

5. 修改与删除记录

你可以编辑或删除记录，也可以在“我的”中使用“清除全部数据”，清除本机记录文档中的经期历史、每日记录和周期设置。配对手表在下次同步时接收更新；清除后的数据代号会阻止手表旧的待同步操作重新写入已清除记录。

在健康写入同步已开启、权限及 Pro 访问仍可用的情况下，应用也会同步修改和删除本应用写入苹果健康的记录。如果同步已关闭、权限被撤销或发生错误，这些操作可能无法完成。请在苹果健康中单独核对和管理相应副本；应用不会删除其他应用写入的原始记录。

导出文件、接收者保存的副本、系统备份、购买记录及设备本地的隐私偏好需分别管理。清除应用记录不会删除这些副本，也不会取消订阅。

6. 本网站与支持邮件

这两个页面不索取或上传经期记录，不包含广告或分析脚本。你选择的页面语言只保存在自己的浏览器中。托管服务 Cloudflare 为提供页面及保障安全，会处理 IP 地址等技术请求信息，详情见 Cloudflare 隐私政策。

联系支持时，我们使用你的邮箱地址及主动提供的信息回复和处理请求。请不要发送完整健康备份、经期历史、密码或付款详情；只有在处理问题确实需要且你愿意提供时，才提供必要的信息。

7. 使用范围与联系

预测日期仅供参考，不用于避孕、医疗诊断或治疗。政策变更会在本页公布并更新日期。

如有隐私问题，请联系 liyong.bj@hotmail.com。