Warm up before you play, stretch after. A badminton coach with a duck.
Last updated: 31 October 2026
DuDu Badminton is a warm-up and stretching coach that runs entirely on your device.
Nothing. DuDu has no servers, no accounts, no ads and no analytics. It makes no network requests of any kind. No data about you or your use of the app is transmitted anywhere, to us or to anyone else.
Everything DuDu remembers is written to a private storage area inside the app’s own sandbox on your device, readable only by DuDu. That includes the name you give yourself, your weekly goal and session lengths, the warm-ups and stretches you finish (when, how long, which moves and how you felt), the routines you build, your capsules, stickers and stardust, and your language, appearance, voice, sound and haptics choices.
That data is removed when you delete the app, or when you choose Profile → Reset progress. If you have iCloud Backup enabled, it may be included in your device backup; that backup is governed by Apple’s privacy policy, not ours.
The voice that reads out each move uses Apple’s built-in speech synthesis, which runs on your device. Nothing you do in DuDu is sent to Apple, to us or to anyone else to produce it.
DuDu reads your device’s language setting so it can start in English or Vietnamese without asking. That value is read locally and never leaves the device. If you pick a language inside DuDu, that choice is stored on the device too.
Profile → Settings in the app has links to this privacy policy and to the support page. Tapping one opens Safari; DuDu itself sends nothing. This website is hosted by GitHub Pages, so GitHub receives the information any website receives when you visit it, such as your IP address, under GitHub’s privacy statement.
DuDu does not track you. It contains no advertising identifiers, no third-party SDKs and nothing that links your activity to other apps or websites.
DuDu collects no data from anyone, including children under 13.
If this policy ever changes, the updated version will be posted on this page with a new date above.
Questions about this policy: minhthang281198@gmail.com
DuDu Badminton không thu thập bất kỳ dữ liệu nào. Ứng dụng không có máy chủ, không có tài khoản, không quảng cáo, không phân tích và không gửi yêu cầu mạng nào. Mọi thứ (tên, mục tiêu, các buổi tập, bài tập tự tạo, hộp quà, nhãn dán và cài đặt) chỉ được lưu trong bộ nhớ riêng của ứng dụng trên thiết bị của bạn và bị xóa khi bạn xóa ứng dụng hoặc chọn Hồ sơ → Xóa tiến trình. Giọng hướng dẫn dùng bộ đọc giọng nói có sẵn của Apple, chạy ngay trên máy. DuDu không theo dõi bạn.
Mọi thắc mắc: minhthang281198@gmail.com