网球发球训练 · 隐私政策
开发者：Dave Well · 生效日期：2026 年 10 月 17 日
1. 我们处理哪些信息
- 摄像头画面与声音：用于录制发球训练、识别落点并估算球速。录像、击球声和分析结果存放在你的 iPhone 本地。
- Apple Watch 运动数据：如果你使用手表端，手表会读取手腕动作（运动传感器）来辅助统计发球次数，数据只在手表与你的 iPhone 之间传输，并保存在你的设备上。
- 设置与训练记录：如持拍手、机位、语言、训练备注，同样只保存在设备本地。
2. 我们不做什么
- App 不联网上传数据，没有账号系统，没有服务器。
- 不包含任何第三方统计、广告或追踪 SDK。
- 不读取你的相册、通讯录、位置或健康数据。
- 不会与任何第三方共享你的数据。
2.1 应用内购买
App 提供 3 次免费训练，之后可一次性付费解锁完整版。付款完全由 Apple（App Store）处理，我们不会接触或保存你的支付信息、Apple ID 或账单资料。免费次数的计数仅保存在你设备的本地钥匙串中，不会上传。
3. 权限说明
- 相机：录制发球训练视频。
- 麦克风：录下击球声，用来提高球速估算的准确度。
- 运动与健身（仅手表）：读取手腕动作来辅助记录发球次数。
你可以随时在系统「设置」中关闭这些权限；关闭后相应功能将无法使用。
4. 数据的保存与删除
训练记录保存在 App 的本地存储中。你可以在 App 内删除任意一次训练（可选择只删除录像、保留分析结果）；卸载 App 会一并删除全部本地数据。
5. 数据导出
你可以主动通过「文件」App、隔空投送或数据线导出训练包。导出后的文件由你自己保管和分享，不再受本 App 控制。
6. 儿童隐私
本 App 不会有意收集任何人（包括儿童）的个人信息，因为它根本不收集数据。
7. 政策更新
如本政策发生变化，我们会更新本页面并修改上方的生效日期。
8. 联系我们
如有任何问题，请发邮件至 davewell3010@gmail.com。
Tennis Serve Trainer · Privacy Policy
Developer: Dave Well · Effective: October 17, 2026
1. What the app handles
- Camera video and audio: used to record your serve practice, detect ball landings and estimate serve speed. Videos, impact sounds and analysis results are stored locally on your iPhone.
- Apple Watch motion data: if you use the watch app, it reads wrist motion (motion sensors) to help count serves. This data moves only between your watch and your iPhone and stays on your devices.
- Settings and training records: such as racket hand, camera side, language and session notes are also stored only on the device.
2. What we don't do
- The app does not upload data over the internet. There are no accounts and no servers.
- It contains no third-party analytics, advertising or tracking SDKs.
- It does not access your photo library, contacts, location or health data.
- We never share your data with any third party.
2.1 In-app purchase
The app includes 3 free training sessions, after which you can unlock the full version with a one-time purchase. Payment is handled entirely by Apple (the App Store); we never see or store your payment details, Apple ID or billing information. The free-session counter is kept only in your device's local keychain and is never uploaded.
3. Permissions
- Camera: to record serve practice video.
- Microphone: to capture impact sounds and improve speed estimates.
- Motion & Fitness (watch only): to read wrist motion to help count serves.
You can turn these off at any time in system Settings; the related features will then stop working.
4. Storage and deletion
Training records are kept in the app's local storage. You can delete any session in the app (optionally deleting only the video and keeping the results). Uninstalling the app removes all local data.
5. Exporting data
You may export training packages yourself via the Files app, AirDrop or cable. Exported files are yours to keep and share, and are no longer controlled by the app.
6. Children's privacy
The app does not knowingly collect personal information from anyone, including children, because it does not collect data at all.
7. Changes to this policy
If this policy changes, we will update this page and the effective date above.
8. Contact
Questions? Email davewell3010@gmail.com.