Core Commitment: This app does not collect, store, or transmit any of your personal data. All encryption and playback operations are performed locally on your device. We do not operate any servers, and we do not integrate any analytics, advertising, or third-party tracking SDKs.
This app is a purely local tool. The videos you import, the passwords you set, and the watermarks and expiration settings you create are all stored only on your device. We cannot access or obtain any of this content.
| Data Type | Collected? | Description |
|---|---|---|
| Video files | No | Encrypted and played locally only; never uploaded |
| Encryption passwords | No | Used only to derive keys locally; never stored or uploaded |
| Watermark content | No | Burned into videos before encryption; stored only in local files |
| Expiration settings | No | Written into encrypted file headers; stored only locally |
| Device identifiers | No | No IDFA, IDFV, or any other device identifiers are collected |
| Channel identifier | No | Optionally written into encrypted file headers; generated on-device and stored only locally (Keychain and encrypted files); never uploaded |
| Usage behavior | No | No statistics or analytics tools are integrated |
| Crash logs | No | Crash information is not uploaded |
| Purchase records | No | Handled by Apple; we do not obtain your payment information |
This app encrypts videos block by block using the AES-256-GCM algorithm. Keys are derived locally from the password you set, using the Argon2id algorithm. Passwords and keys are never saved in encrypted files and never leave your device. Because we cannot access your password, encrypted files cannot be decrypted if the password is lost.
The core features of this app work entirely offline and require no network connection. Network access may occur only in the following cases:
Other than the above, this app does not initiate any network requests on its own.
This app integrates no third-party advertising, analytics, social, or data-tracking SDKs. App Store purchases are provided by Apple, and the processing of that data is governed by Apple's own privacy policy.
When you use the export feature (exporting .smvid files), the files are saved to the location you specify or sent via the system share sheet to the recipient you choose. This process is initiated entirely by you. We are not involved and cannot know the content or destination of the files. Please ensure that your sharing is lawful and compliant.
This app is not directed at children under 13, and we do not knowingly collect any information from children. Since this app collects no user data, there is no data processing involving children.
Because we do not collect any of your personal data, there is no personal information for you to request access to, correct, or delete. All data on your device is managed, exported, or deleted entirely by you. To remove all data created by this app, you can simply delete the app and the files in its sandbox directory.
We do not retain any of your data, so there is no retention period. All encrypted files, passwords, and watermark information remain only on your device and are entirely under your control.
Because this app collects no data, there is no consent to withdraw. You may terminate all data processing by this app at any time by deleting the app.
We may update this privacy policy from time to time. The updated version will be published on this page and will take effect on the date of publication. If an update involves material changes, we will notify you prominently within the app.
If you have any questions about this privacy policy, please contact us at:
Email: ttservice2026@163.com