White Noise is a tool for playing sounds that help you sleep, relax and focus. You can mix sounds such as rain, ocean waves and a fan, adjust each volume, save your own mixes and set a sleep timer.

We do not collect any personally identifiable information, nor do we collect device identifiers, location, contacts or usage data. The app has no account system; all features work without signing in.

The app does not request the internet permission. Every sound is generated live by the app on your device, so no audio files are downloaded, and the app is technically unable to send any data to our servers.

While sounds play, the app records a "still playing" timestamp in its private storage once a minute, together with the time playback started. It is used only to notice, the next time you open the app, that the last playback was stopped unexpectedly by the system, and to tell you so. These timestamps contain no audio or content, stay in the app's private storage, are not part of the backup file and never leave your device; the "playing" flag is cleared when playback ends normally.

Your saved mixes (names, sounds and volumes), the last mix you played and your settings are stored in the app's private storage on your device.

After every change to your saved mixes or settings, the app automatically writes them to a local backup file at Download/WhiteNoise/whitenoise_backup.json on your device. The file stays on your device, is not deleted when you uninstall the app, and is never accessible to us.

Uninstalling the app or clearing its data deletes the content in its private storage; after reinstalling or clearing data you can choose that backup file in the app to restore it. The app does not use Google account or any other cloud backup.

Foreground service (media playback): keeps the sound playing when the screen is locked or you switch to another app, and shows playback controls in the notification shade and on the lock screen.

Notifications (Android 13 and later): requested the first time you start playing, and used only for the playback controls notification. Sounds play normally without it; there are just no controls in the notification shade or on the lock screen.

Keep awake (wake lock): keeps the processor running while sounds play, because they are generated live and would cut out if the processor slept. It is released as soon as playback pauses or stops.

Storage (WRITE_EXTERNAL_STORAGE, Android 9 and below only): used solely to save the local backup file to public Downloads on older Android versions. Android 10 and above use MediaStore and need no permission.

The app does not request internet, camera, microphone, location or contacts permissions.

To avoid disturbing calls and other apps, the app requests audio focus from the system: it pauses automatically when a call comes in or another app starts playing, and when headphones are unplugged. You can turn on Play with other apps in Settings to change this.

Playback controls in the notification shade, on the lock screen and on headphones use Android's media session. Only commands such as play, pause and close and the name of the current mix are passed; no personal information is involved.

The app does not include any advertising, analytics or crash-reporting SDKs.

The app is distributed through Google Play. Depending on your device settings, Google may collect diagnostic information such as installs and crashes, which is governed by the Google Privacy Policy (https://policies.google.com/privacy).

The app is not directed at children under 13, and it does not collect personal information from any user, including children.

We may update this policy when the app, the law or our operations change. The updated policy will be published on this page with a new effective date. If a new version materially changes how data is handled, we will notify you prominently in the app.

If you have any questions or requests about this policy or your privacy, please contact us at [email protected].

白噪音是一款播放助眠、放松和专注声音的工具。您可以把雨声、海浪、风扇等多种声音混合播放，分别调节音量，保存自己的组合，并设置定时关闭。

我们不收集任何能够识别您个人身份的信息，也不收集设备标识符、位置、通讯录、使用行为等数据。本应用没有账号体系，您无需注册或登录即可使用全部功能。

本应用未申请网络权限。所有声音都由应用在您的设备上实时计算生成，不需要下载音频文件，技术上也无法把任何数据发送到我们的服务器。

您保存的组合（名称、包含的声音和音量）、上一次播放的组合和应用设置保存在本应用的私有存储中，只在您的设备上。

播放时，应用每隔一分钟在私有存储里记录一次「仍在播放」的时间点，并记下播放开始时间，只用来在下次打开时发现「上次播放被系统意外停止」并提示您。这些时间点不含任何声音内容，只保存在本应用的私有存储中，不进入备份文件，也不会离开您的设备；播放正常结束后「正在播放」标记会被取消。

每次修改保存的组合或设置后，应用会自动把保存的组合和设置写入设备的 Download/WhiteNoise/whitenoise_backup.json 本地备份文件。该文件只保存在您的设备上，卸载应用不会删除，开发者无法访问。

卸载本应用或清除应用数据会删除应用私有存储中的内容；重新安装或清除数据后，您可以在应用里选择上述备份文件恢复。本应用不使用 Google 账号或其他云端备份。

前台服务（媒体播放）：锁屏或切换到其他应用后继续播放，并在通知栏和锁屏上显示播放控制。

通知（Android 13 及以上）：第一次开始播放时请求，用于显示播放控制通知。不允许也可以正常播放，只是通知栏和锁屏上没有控制按钮。

保持唤醒：播放期间保持处理器运行，声音是实时合成的，处理器休眠会导致断音。暂停或停止播放后立即释放。

存储权限（WRITE_EXTERNAL_STORAGE，仅 Android 9 及以下）：仅用于在低版本系统上把本地备份文件保存到公共下载目录。Android 10 及以上使用 MediaStore，无需此权限。

本应用不申请网络、相机、麦克风、位置、通讯录等权限。

为了不打扰通话和其他应用，本应用会向系统申请音频焦点：来电或其他应用开始播放时自动暂停，拔下耳机时也会暂停。您可以在设置中开启「与其他应用同时播放」来关闭这一行为。

通知栏、锁屏和耳机按键的播放控制通过 Android 系统的媒体会话实现，只传递播放、暂停、关闭等指令和当前组合的名称，不涉及个人信息。

本应用不集成任何广告、统计分析或崩溃上报等第三方 SDK。

本应用通过 Google Play 分发。Google 可能会根据您的设备设置收集应用安装、崩溃等诊断信息，相关处理适用 Google 隐私权政策（https://policies.google.com/privacy）。

本应用不面向 13 周岁以下儿童，也不会收集任何用户（包括儿童）的个人信息。

我们可能会根据产品功能、法律法规或运营需要更新本隐私政策。更新后，我们会在本页面发布新的隐私政策并更新生效日期。如新版本涉及数据处理方式的重大变化，我们会在应用内以显著方式提示。

如果您对本隐私政策或个人信息保护有任何疑问、意见或请求，可以通过邮箱 [email protected] 联系我们。