生效日期：2026 年 11 月 3 日 ｜ 适用于 iOS 版「拆轨」（Stemcraft）1.1.0 及以后版本
「拆轨」（以下简称"本应用"）由中山网维软件技术有限公司（Wvnew Science and Technology Co., Ltd.，以下简称"我们"）开发并运营，是一款在本机完成音乐分轨与练习播放的工具。
我们不收集任何个人信息。本应用没有账号系统，不需要注册或登录，不含广告，不含第三方统计、分析或跟踪组件。本应用自身不发起任何网络请求——你可以在飞行模式下走完导入、分离、试听、练习、导出的完整流程，我们也没有任何能接收你音频的服务器。
本应用只请求一项权限：通知。它在第一次开始分离时才询问，用途只有一个——六轨分离可能耗时较长，你离开 App 后，分离完成或失败时用一条本地通知告诉你。
导入音频使用系统的文件选择器，不需要相册或存储权限。本应用在后台继续播放音频，是为了让你锁屏或切换 App 时练习不中断，此时不进行任何采集。
| 权限 / 能力 | 用途 | 是否必需 |
|---|---|---|
| 通知 | 分离完成或失败时在本机提醒 | 可选 |
| 后台音频 | 锁屏、切换 App 时继续播放 | 播放功能需要 |
| 文件选择器 | 由你主动选取要导入的音频文件 | 导入时使用 |
| 麦克风 / 相机 / 相册 / 定位 / 通讯录 | 不使用，也不申请 | — |
| 网络 | 不申请，本应用无网络代码 | — |
本应用只在你设备的 App 沙盒内保存以下内容，它们不会离开这台设备：
导出物放在 App 的「Exports」目录，可通过「文件」App 直接取走。本应用不会把这些文件上传到任何服务器。
关于设备备份：本应用的沙盒数据会参与你设备自身的备份（iCloud 备份或电脑备份），这是 iOS 的系统行为，由你的备份设置决定，不经过我们。如果不想让音频进入备份，可在 iOS「设置 → Apple 账户 → iCloud → 管理账户存储 → 备份」中调整，或关闭本应用的备份。
本应用免费下载，六轨分离与录音室档通过一次性内购解锁（非消耗型，无订阅、无自动续费），完全通过 Apple App Store 内购完成。支付由 Apple 处理：
本应用不面向儿童设计，也不收集任何人的信息——包括儿童。任何年龄的用户使用本应用都不会产生数据收集行为，因此不存在需要监护人同意的儿童个人信息处理。
由于本应用没有账号、不收集个人信息，不存在需要向我们申请导出、更正或删除的个人数据。你对本机数据的控制方式如下：
本应用不提供在线音乐搜索、试听或曲库下载，也不能打开流媒体平台的加密音频。请只导入你拥有权利、或已获得权利人授权的内容。分离结果的使用同样受原作品权利约束——分轨不会改变原作品的版权归属。
本应用按「现状」提供。分离质量取决于素材本身（混音密度、录音质量、乐器是否突出），不对特定素材的效果作出承诺。
本应用的分离能力基于以下开源项目。它们以 MIT 许可发布，我们在此保留其版权声明与许可全文：
| 组件 | 用途 | 版权 |
|---|---|---|
| Demucs | 四轨分离的网络结构与权重 | Copyright (c) Meta Platforms, Inc. and affiliates. |
| BS-RoFormer | 六轨分离的网络结构（代码） | Copyright (c) 2023 Phil Wang |
| Music-Source-Separation-Training | 六轨分离的推理框架（代码） | Copyright (c) 2024 Roman Solovyev (ZFTurbo) |
MIT License Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
若本应用的功能发生可能影响隐私的变化（例如未来引入联网能力或数据收集），我们会先更新本政策，并在 App 内以显著方式提示，而不只是改动这一页。更新后页面顶部会标注新的生效日期。
对本政策或数据处理有任何疑问，请通过以下方式联系：
中山网维软件技术有限公司
Wvnew Science and Technology Co., Ltd.
邮箱 Email：51525510@qq.com
Effective date: 3 November 2026 ｜ Applies to Stemcraft for iOS, version 1.1.0 and later
Stemcraft (the "App") is developed and operated by Wvnew Science and Technology Co., Ltd. (中山网维软件技术有限公司, "we" or "us"). It splits a song into stems and provides practice playback, entirely on your device.
We collect no personal information. The App has no accounts, no sign-up or login, no ads, and no third-party analytics, tracking or advertising components. The App itself makes no network requests — you can import, separate, listen, practise and export in Airplane Mode from start to finish, and we operate no server that could receive your audio.
The App requests exactly one permission: notifications. It is requested when you first start a separation, for one purpose only — six-stem separation can take a while, so a local notification tells you when it finishes or fails while you are in another app.
Audio is imported through the system file picker, so no Photos or storage permission is needed. The App keeps playing in the background so that locking the screen or switching apps does not interrupt practice; nothing is captured while doing so.
| Permission / capability | Purpose | Required |
|---|---|---|
| Notifications | Local notice when separation finishes or fails | Optional |
| Background audio | Keep playing when locked or switched away | Required for playback |
| File picker | You choose which audio file to import | Used when importing |
| Microphone / Camera / Photos / Location / Contacts | Not used, not requested | — |
| Network | Not requested; the App has no networking code | — |
The App stores the following inside its own sandbox on your device. None of it leaves the device:
Exports are written to the App's "Exports" folder and can be taken out directly through the Files app. The App never uploads these files to any server.
About device backups: the App's sandbox is included in your own device backup (iCloud Backup or computer backup). That is standard iOS behaviour governed by your backup settings, and it does not pass through us. To keep audio out of backups, adjust iOS Settings → Apple Account → iCloud → Manage Account Storage → Backups, or exclude this App from backup.
The App is free to download. Six-stem separation and the Studio tier are unlocked by a one-time in-app purchase (non-consumable; no subscription, no auto-renewal), handled entirely through Apple's In-App Purchase. Payment is processed by Apple:
The App is not directed at children, and it collects information from no one — children included. No data collection occurs for users of any age, so no parental consent for children's personal data is applicable.
Because the App has no account and collects no personal information, there is no personal data held by us to export, correct or erase. Your control over data on your device works as follows:
The App offers no online music search, preview or catalogue download, and cannot open encrypted audio from streaming services. Please import only content you own or are licensed to use. Using the separated output is likewise bound by the rights in the original work — splitting a track does not change who owns it.
The App is provided as is. Separation quality depends on the material itself (mix density, recording quality, how prominent each instrument is); no particular result is promised for any particular material.
The separation capability of the App builds on the following open-source projects, released under the MIT license. Their copyright notices and the full license text are reproduced here:
| Component | Purpose | Copyright |
|---|---|---|
| Demucs | Network architecture and weights for 4-stem separation | Copyright (c) Meta Platforms, Inc. and affiliates. |
| BS-RoFormer | Network architecture for 6-stem separation (code) | Copyright (c) 2023 Phil Wang |
| Music-Source-Separation-Training | Inference framework for 6-stem separation (code) | Copyright (c) 2024 Roman Solovyev (ZFTurbo) |
MIT License Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
If the App changes in a way that could affect privacy (for example, adding networking or data collection), we will update this policy first and announce it prominently inside the App, rather than only editing this page. The effective date at the top will be updated accordingly.
If you have any questions about this policy or how data is handled, please contact us:
Wvnew Science and Technology Co., Ltd.
中山网维软件技术有限公司
Email: 51525510@qq.com