iPhone · iOS
One vault,
only you two can open
Photos and videos are encrypted on your device and shared with exactly one person, paired by invite code. The key never leaves your phone.
How it works
- Store — Encrypt photos and videos with AES-GCM in your personal vault.
- Connect — Sign in with Apple or Google and link with your partner using an invite code.
- Share — View together in the couple vault, with a view history of who opened what.
Key features
- Personal vault — AES-GCM encrypted storage, Face ID/Touch ID lock, and automatic re-lock when the app goes to the background
- Couple vault — Partner linking by invite code, photo and video sharing, view history
- Breakup mode — Partner access is blocked immediately; shared items are blurred for 7 days and then permanently deleted
- Premium subscription — Removes the viewing window (21 days on Free) and the video length limit (30 seconds on Free). Storage is 20 GB on both plans
Security principles
- The encryption key (master key) is stored only in your device's Keychain and is never sent to a server.
- Servers hold encrypted data (ciphertext) only; no one, including the operator, can read the contents.
- Your app passphrase is used only to restore the key and is never transmitted anywhere.
- If you lose your passphrase, your data cannot be recovered. This is intentional, for security.
Notices and limitations
- Personal vault data is stored on your device only and is not stored on servers.
- Couple vault data is stored on servers in end-to-end encrypted form only.
- Responsibility for uploaded content and any legal consequences rests with the user.
- This service is not directed at children under 14.
Contact
- Operator: XTI Co.,Ltd. (주식회사 엑스티아이)
- Support email: [email protected]
- Website: https://x-ti.org/duovault/en
- Hours: Weekdays 09:00–18:00 (KST)
- We aim to respond within two business days.