Tĩnh Lặng — Privacy Policy
Last updated: 2026-08-05
Tĩnh Lặng is built by Sakura5. There is no account, no sign-in, and no Tĩnh Lặng server: the app makes no network requests at all. Every meditation, story, ambient loop and video clip is bundled inside the app, so it works fully offline, in aeroplane mode, forever. We receive nothing from you, because there is no channel through which anything could reach us.
What the app handles
- Nothing. The app collects no data and sends no data anywhere. Its privacy manifest declares no collected data types and no tracking.
- Your listening history — minutes listened and your daily streak — is written to a file inside the app's own storage on your iPhone. It never leaves the device, and Settings → “Xoá toàn bộ dữ liệu” (Erase all data) deletes it.
- Your preferences — language, theme, reminder time, the last track you played — are stored locally in iOS UserDefaults on your device.
- A video you render in Studio — saved to your own Photos library when you ask for it, and nowhere else.
Offline by design
Tĩnh Lặng contains no networking code: no URLSession, no backend, no analytics SDK, no advertising SDK, no crash reporter, no third-party SDK of any kind. The app is not linked against a single external library. That is why there is no “data retention period” to describe — nothing is ever transmitted, so there is nothing for us to keep.
Permissions, and exactly when they are asked
Photos (add only). When you tap save at the end of a Studio render, and only then, iOS asks for add-only permission to your photo library so the finished video can be written into it. The app requests the add-only level, which cannot read or list your existing photos. Deny it and everything else keeps working.
Notifications (optional). If you switch on the daily reminder, the app asks for notification permission and schedules one repeating local notification on your device — at most one a day, at the time you chose, replacing any previous one. It is generated by your iPhone; no push server is involved, and we are never told whether you opened it. Turning the reminder off removes it.
Nothing else is requested: no microphone, no camera, no photo reading, no location, no contacts, no health data.
Content and licences
All narration — the four guided meditations and the four bedtime stories — is original material written and produced for this app; nothing is quoted from any book or teacher. The ambient recordings are public-domain / CC0 field recordings, and the Studio nature clips are used under the Coverr licence.
Not medical advice
Tĩnh Lặng is for relaxation and sleep. It is not a medical device, it makes no health claims, and it is not a substitute for professional care.
Tóm tắt bằng tiếng Việt
Tĩnh Lặng không thu thập bất kỳ dữ liệu nào. Ứng dụng không có tài khoản, không đăng nhập, không máy chủ, và không gửi gì ra ngoài — toàn bộ bài thiền, câu chuyện, âm thanh nền và video đều nằm sẵn trong máy nên dùng được hoàn toàn khi không có mạng. Số phút đã nghe và chuỗi ngày được lưu ngay trên iPhone của bạn và có thể xoá sạch trong phần Cài đặt → “Xoá toàn bộ dữ liệu”. Ứng dụng chỉ xin quyền Ảnh (dạng chỉ thêm) đúng lúc bạn lưu video vừa dựng trong Studio, và xin quyền thông báo nếu bạn bật lời nhắc hằng ngày — nhắc tại chỗ trên máy, nhiều nhất một lần mỗi ngày. Không quảng cáo, không theo dõi, không bán dữ liệu. Ứng dụng chỉ để thư giãn, không phải thiết bị y tế.
What we do NOT do
- We do not sell your data.
- We do not use your data for advertising or cross-app tracking.
- We do not offer accounts at all — there is no sign-up, no sign-in, and no profile anywhere in the app.
- We do not send anything off your device. The app contains no networking code whatsoever.
- We do not use analytics, attribution, advertising or crash-reporting SDKs — the app links no third-party library at all.
- We do not read your photo library; the Photos permission we request is add-only, for saving a video you made.
- We do not send push notifications. The optional reminder is a local notification generated by your own iPhone.
Third parties
None. Tĩnh Lặng has no third-party services, no ad networks, no analytics providers and no subscription provider. Version 1.0 is entirely free with no in-app purchases, so not even Apple's payment system is involved.
Children
Tĩnh Lặng does not knowingly collect personal information from children.
Contact
Email support@sakura5.app.