SonderVault

Private, encrypted vault for photos, videos and files on Android. Argon2id + AES-256, duress password, fingerprint unlock, encrypted sharing. No internet permission, no account, nothing leaves your phone.

What it does Hides things properly. Anything you add is encrypted and the original is removed from your phone, so it is gone from your gallery rather than tucked into a folder.

Opens with a password or a fingerprint. The password is the only real key; the fingerprint is a second wrapping of it, and turning it off deletes that wrapping.

Has a duress password. A second password that opens a different set of photos — ones you chose, so it looks like an ordinary vault rather than an empty one. Optionally it destroys the real vault as it opens. Nothing anywhere in the app hints that a second vault exists.

Shares as one encrypted file. Any selection becomes a single .sondervault file with its own six-word code, shown with a QR. A code that leaks costs that file and nothing else. The recipient can scan the code or type it.

Backs up the same way. A backup is a share of everything, to yourself.

Reads what it holds. Photos zoom, videos play and scrub, PDFs and text files open — all decrypted as they are read, never copied out to a temporary file.

Blocks screenshots, screen recording and the recents thumbnail, everywhere in the app.

License Apache License 2.0 — see LICENSE and NOTICE. Free to use with attribution; you may not claim it as your own or imply the author's endorsement.

Fonts: Unbounded and DM Sans, SIL Open Font License. The BIP-39 wordlist keeps its own licence.