VaultMark: Document Vault

Lock your ID, contracts, payslips and medical papers in an encrypted vault on your phone, and share them safely.

VaultMark is a private document vault. Everything stays on your device: no account, no cloud, no ads, no tracking, and the app needs no network to work.

WATERMARK DOCUMENTS BEFORE YOU SHARE
Before a document leaves your phone, VaultMark adds a watermark across the whole page with the text you choose (for example "For Example Bank, rental application") and today's date. It also strips every piece of hidden data: location, device model, author, edit history. Use it to watermark documents such as an ID copy, a proof of address or a payslip, so a copy cannot be reused for something else. It is the quickest way to remove metadata before you send a file.
The shared file is rebuilt from the pixels. The watermark cannot be peeled off and the metadata is gone. Your private copy is never changed.

A SECURE FOLDER FOR EVERY PAPER
Start with ready-made folders (identity, housing, health, money and taxes, work, vehicle, family) or build your own tree. Scan paper documents with your camera, or import a PDF or an image. Search, mark favourites, and select several documents from different folders to share them in one protected bundle.

SHARE IN FROM OTHER APPS
Received a PDF or an image? Use Share or Open with, choose VaultMark, and protect it right away without even adding it to the vault.

SECURE BY DESIGN
- AES-256-GCM encryption, key kept in the secure storage of your phone
- Unlock with fingerprint or face, with a 6-digit code as backup
- The vault locks itself when you leave the app, so nothing stays open
- Encrypted backup file protected by its own password
- Works fully offline: a private, safe place for your files

Good to know: there is no recovery of a forgotten code, on purpose. Keep an original of every document elsewhere. A watermark discourages misuse, it cannot stop someone who already has the file.

PDF files and images are supported. Pages of a PDF become watermarked images, so the text can no longer be selected.

Recent changes:
First release of Vault Mark.