Lucent 隐私政策 / Lucent Privacy Policy

最后更新：2026 年 8 月 13 日 · 生效：2026 年 8 月 13 日 Last updated: August 13, 2026 · Effective: August 13, 2026

一句话版本：Lucent 没有服务器，不联网，不上传任何东西。 下面是细节。 In short: Lucent has no server, does not connect to the internet, and does not upload anything. Here are the details.

一、我们收集的信息 / 1. Information We Collect

1.1 相机 / 1.1 Camera

Lucent needs camera access to estimate ambient light and compare the screen with its surroundings.

关于相机使用，请明确以下几点： A few important things to know about camera use:

Lucent 不拍摄照片，不录制视频，不保存任何图像 Lucent does not take photos, record video, or save images.
相机画面仅在设备本地实时处理。进入 App 的只有一个数字——由 ARKit 环境光估计得出的照度值 Camera frames are processed in real time on your device. The app receives only a number: an illuminance estimate from ARKit's ambient-light estimation.
屏幕检测功能会短暂显示相机预览画面，该画面不被存储，不离开设备 The screen check briefly displays a camera preview. That preview is not stored and never leaves your device.
相机仅在 App 处于前台时工作。iOS 系统禁止 App 在后台使用相机，因此 Lucent 在后台不进行任何光照采样 The camera works only while Lucent is in the foreground. iOS does not allow apps to use the camera in the background, so Lucent does not sample light in the background.

1.2 你在 App 内产生的数据 / 1.2 Data You Create in the App

光照采样片段：起止时间、该片段的代表照度（中位数）、所属档位 Light samples: start and end times, representative illuminance (the median), and the assigned light band.
手动打点：时刻、当时的照度、你选择的场景标签（书桌 / 床头 / 窗边 / 教室 / 户外） Manual entries: the time, the light reading at that time, and the scene label you choose (desk, bedside, window, classroom, or outdoors).
设置偏好：建议模型档位、基线间隔、专注模式联动开关、休息提醒穿透开关 Preferences: the suggestion model, baseline interval, Focus mode integration, and whether break reminders can interrupt Focus.

All of this data is stored locally on your device (in the app’s Application Support directory and system preferences). It is never sent to a server.

All of this data is stored locally on your device (in the app's Application Support directory and system preferences). It is not sent to a server.

1.3 我们不收集的信息 / 1.3 Information We Do Not Collect

不收集姓名、邮箱、电话号码等任何个人身份信息 We do not collect personally identifying information such as your name, email address, or phone number.
不收集广告标识符（IDFA），不做任何形式的追踪 We do not collect your advertising identifier (IDFA) or track you.
不收集位置信息 We do not collect location data.
不生成、不上传设备标识符 We do not create or upload device identifiers.
不含第三方分析 SDK、广告 SDK 或崩溃收集 SDK Lucent contains no third-party analytics, advertising, or crash-reporting SDKs.
没有账号体系，不需要注册或登录 Lucent has no account system; you do not need to register or sign in.

二、信息的使用 / 2. How Information Is Used

Data created on your device is used only to:

在 App 内展示你的用眼环境记录 Show your visual-environment history in the app.
计算建议的休息间隔 Calculate suggested break intervals.
生成你主动发起的 CSV 导出文件 Create a CSV file when you choose to export one.

三、信息的共享 / 3. Sharing

We do not share your data. Lucent has no servers, uploads no data, and shares nothing with third parties.

We do not share your data. Lucent has no server, uploads no data, and shares no information with third parties.

The app makes no network requests. This is a fact about the code, not just a promise: you can use every Lucent feature in Airplane Mode.

The app makes no network requests. This is not just a promise; it is verifiable in the code. You can use every Lucent feature in Airplane Mode.

When you export a CSV, iOS hands the file to you through the system share sheet. We do not handle or access the exported file.

When you export a CSV, iOS hands the file to you through the system share sheet. We do not handle or access that file.

四、通知 / 4. Notifications

Lucent’s break reminders are local iOS notifications scheduled by your device. There are no remote push notifications, and the app has no push certificate.

Lucent's break reminders are local notifications scheduled by your device. There are no push notifications, and the app has no push certificate.

If you do not grant notification permission, Lucent’s timer still works from its fixed baseline; it simply will not send reminders.

If you do not grant notification permission, the timer still works with its fixed baseline; Lucent simply will not send reminders.

五、数据的存储与删除 / 5. Storage and Deletion

所有数据保存在你的设备上，随 App 的沙盒受 iOS 系统级数据保护 All data is stored on your device and protected by iOS data protection within the app sandbox.
删除 App 即删除全部数据，包括采样记录、打点和所有设置 Deleting the app deletes all data, including samples, manual entries, and preferences.
当前版本的 App 内没有「一键清除全部记录」的入口。要彻底清除，请删除 App The current app does not have a “delete all records” button. Delete the app to remove everything.

六、儿童隐私 / 6. Children's Privacy

Lucent is not directed to children under 13 and does not knowingly collect anyone’s personal information; it does not collect data at all.

Lucent is not directed to children under 13 and does not knowingly collect anyone's personal information, because it does not collect data.

The app’s “Child” setting is a suggested-model option that shortens break intervals. It is not an account type and does not involve collecting or processing children’s data.

The “Children” option in the app is a suggestion-model setting that makes break intervals more frequent. It is not an account type and does not involve collecting or processing children's data.

七、健康与测量免责声明 / 7. Health and Measurement Disclaimer

Lucent 提供的休息间隔建议是 Lucent 自有的模型，参考 20-20-20 原则并按环境照度调整。它不是医学标准，不构成诊断、治疗或医疗建议。如有视力或眼部健康问题，请咨询专业眼科医生。 Lucent's break intervals are suggestions from Lucent's own model, inspired by the 20-20-20 rule and adjusted for ambient light. They are not a medical standard and are not medical advice, diagnosis, or treatment. Consult an eye-care professional about vision or eye-health concerns.
照度读数是基于 ARKit 环境光估计的估计值，不是经校准的照度计测量结果，不适用于任何需要精确照度测量的场合。 Light readings are estimates based on ARKit ambient-light estimation, not measurements from a calibrated light meter. Do not use them where precise illuminance measurements are required.
屏幕检测输出的是屏幕与环境的对比比值，不是屏幕的绝对亮度（nit）。自发光屏幕的绝对亮度无法通过本方法诚实得出。 The screen check reports a screen-to-ambient contrast ratio, not the screen's absolute brightness in nits. This method cannot reliably determine the absolute brightness of an emissive display.

八、政策变更 / 8. Changes to This Policy

If this policy changes, we will update this page and the “Last updated” date at the top.

If this policy changes, we will update this page and revise the “Last updated” date at the top.

九、联系我们 / 9. Contact

邮箱：norvynzhang@gmail.com
Email: norvynzhang@gmail.com

十、适用法律 / 10. Governing Law

This Privacy Policy is governed by the laws of the People’s Republic of China.

This Privacy Policy is governed by the laws of the People's Republic of China.