Privacy Policy

Last updated: October 26, 2026

This Privacy Policy applies to Badminton Follow (羽毛球跟练), a badminton training follow-along app. It is a standalone training app and is not one of the ScoreSyncer scoring apps; its data practices are described below.

Information We Collect

We collect only the minimum information necessary to run the app:

• On-device data only: Your training records, plan progress, and settings are stored locally on your device. This app has no accounts and does not upload this data to any server.
• Advertising data (iOS version only): Processed by Google AdMob, as described under "Advertising" below.
• Problem reports (only when you send one): See "Problem Reports" below.
• Contact form (only when you use it): The email address, subject and message you enter in Settings → Contact Us are sent to our support server (safecommunity.100for1.com) and forwarded to us by email, so we can reply. We use them only to answer you. This form currently uses an unencrypted (HTTP) connection; if you prefer, email us directly at zachsong@gmail.com instead.

Problem Reports

Every exercise has a "Report a problem" button. Nothing is sent unless you fill in the form and tap Submit. A report contains:

• the exercise (its ID and name), the training it belongs to, and the instruction text you were viewing;
• the problem type you chose and the description you typed;
• the app's language and the app's identifier;
• a random anonymous ID that the app generates on your device (it is not your name, email, advertising ID, or any hardware identifier), and your IP address, which any internet request reveals.

Reports are sent over HTTPS to our own report server (lang1000.100for1.com), which also handles feedback for our other apps. We use them only to check and fix exercise content. They are not used for advertising, not sold, and not shared with third parties. We keep reports to track content fixes; you can ask us to delete yours at any time (see "Data Storage and Retention"). Please do not include personal information in the description.

Microphone and Speech Recognition (Optional Voice Commands)

Voice commands are off by default. If you turn them on in Settings, the app asks for microphone and speech-recognition permission and, only while a training session is running, listens for "pause" and "resume" so you can control the session hands-free.

Speech is recognized by your device's built-in speech recognition service: Apple's on iOS, and Google's or your device maker's on Android. That service may process the audio on its own servers under its own privacy policy. The app does not record or store audio, and neither audio nor transcripts are sent to us. You can turn voice commands off, or revoke the permission in your device settings, at any time.

Information We Do Not Collect

• We do not collect your name, email address, phone number, or any account credentials.
• We do not operate any account or login system.
• We do not sell your personal data.

Advertising

The iOS version of this app displays advertisements provided by Google AdMob. The Android version shows no ads.

The app does not ask for tracking permission (Apple's App Tracking Transparency), so it does not access your device's advertising identifier (IDFA), and ads are not personalized by tracking you across other companies' apps and websites. To deliver and measure ads, Google AdMob may still collect and process:

• device and app information (such as device model, operating system version and app version);
• your IP address and the approximate (coarse) location derived from it;
• ad interaction data and diagnostic information.

Google's handling of advertising data is governed by Google's Privacy Policy. You can review and adjust your ad personalization settings at adssettings.google.com.

Purchases

You can permanently remove ads through an in-app purchase. Purchases are processed by Apple or Google; we do not receive or store your payment details.

Data Storage and Retention

Your training records, plans, and settings never leave your device and are not stored on our servers. Deleting the app removes all of its locally stored data. Problem reports you choose to send are kept as described under "Problem Reports". To have your reports deleted, contact us with the approximate date and the exercise you reported.

Children's Privacy

This app is not directed to children under 13. We do not knowingly collect personal information from children.

Changes to This Policy

We may update this Privacy Policy from time to time. We will notify users of any material changes by updating the "Last updated" date above.

Contact

If you have questions about this Privacy Policy or wish to request data deletion, please reach us through our contact form or at zachsong@gmail.com.

中文

本隐私政策适用于 羽毛球跟练(Badminton Follow)——一款羽毛球训练跟练 App。它是独立的训练类 App,并非 ScoreSyncer 的计分 App,其数据处理方式如下。

我们收集的信息

• 仅存于本机:训练记录、计划进度与设置仅保存在你的设备本地。本 App 无账号体系,不会将这些数据上传到任何服务器。
• 广告数据(仅 iOS 版):由 Google AdMob 处理,详见下方「广告」一节。
• 问题反馈(仅在你主动提交时):详见下方「问题反馈」一节。
• 联系表单(仅在你使用时):你在「设置 → 联系我们」填写的邮箱、主题和留言会发送到我们的客服服务器(safecommunity.100for1.com)并转发到我们的邮箱,仅用于回复你。该表单目前使用未加密(HTTP)的连接;如有顾虑,也可以直接发邮件到 zachsong@gmail.com。

问题反馈

每个动作都有「报告问题」按钮。只有在你填写并点击「提交」后才会发送,内容包括:

• 动作(编号与名称)、所属训练,以及你当时看到的说明文字;
• 你选择的问题类型和填写的描述;
• App 的界面语言和 App 标识;
• App 在你设备上随机生成的匿名编号(不是你的姓名、邮箱、广告标识符或任何硬件标识),以及任何联网请求都会带上的 IP 地址。

反馈通过 HTTPS 发送到我们自己的反馈服务器(lang1000.100for1.com,同时处理我们其他 App 的反馈),仅用于核实和修正动作内容,不用于广告、不出售、不提供给第三方。反馈会保留用于跟踪内容修正,你可随时要求删除(见「数据存储与保留」)。请不要在描述中填写个人信息。

麦克风与语音识别(可选的语音指令)

语音指令默认关闭。只有你在设置中开启后,App 才会请求麦克风和语音识别权限,并且只在训练进行中监听「暂停」「继续」,方便你免触屏控制训练。

语音由设备自带的语音识别服务完成:iOS 上为 Apple 的服务,Android 上为 Google 或设备厂商的服务。该服务可能在其服务器上处理音频,并受其自身隐私政策约束。本 App 不录音、不保存音频,音频和识别文字都不会发送给我们。你可以随时关闭语音指令,或在系统设置中撤销权限。

我们不收集的信息

• 不收集你的姓名、邮箱、电话或任何账号凭据。
• 不设任何账号或登录系统。
• 不出售你的个人数据。

广告

本 App 的 iOS 版通过 Google AdMob 展示广告,Android 版不显示广告。

本 App 不请求追踪授权(Apple 的 App Tracking Transparency),因此不会读取设备的广告标识符(IDFA),广告也不会基于跨 App、跨网站的追踪进行个性化。为投放和衡量广告,Google AdMob 仍可能收集并处理:

• 设备与 App 信息(如设备型号、系统版本、App 版本);
• 你的 IP 地址及由其推断的大致位置;
• 广告互动数据与诊断信息。

Google 对广告数据的处理受 Google 隐私政策 约束。你可在 adssettings.google.com 查看并调整广告个性化设置。

购买

你可通过应用内购买永久去除广告。购买由 Apple 或 Google 处理,我们不接收或存储你的支付信息。

数据存储与保留

你的训练记录、计划与设置始终留在设备本地,不会存储在我们的服务器上。删除 App 即删除其全部本机数据。你主动提交的问题反馈按「问题反馈」一节所述保留;如需删除,请联系我们并告知大致提交日期和所报告的动作。

未成年人隐私

本 App 不面向 13 岁以下儿童,我们不会在知情的情况下收集儿童的个人信息。

政策变更

我们可能不时更新本隐私政策,并通过更新上方「更新日期」告知重大变更。

联系我们

如对本政策有疑问或希望请求删除数据,请通过 联系表单 或发送邮件至 zachsong@gmail.com 与我们联系。