Calculator Vault: Hide Photos

Hide photos, hide videos and lock private files behind a real calculator. CalcPrivacy Vault is an offline photo vault built without internet permission — nothing can leave your phone. It looks like an ordinary scientific calculator, and it is one. Enter your secret PIN instead of a calculation and the calculator lock opens a hidden, encrypted gallery for your photos, videos, documents and notes.

WHY THIS VAULT APP IS DIFFERENT

- Truly offline. The app ships without the INTERNET permission. No servers, no accounts, no sync, no uploads. Other calculator vault apps bundle a browser and ad networks — this one cannot connect at all.
- No ads, no subscription, no trackers. One optional one-time purchase unlocks Premium.
- Real disguise. A fully working scientific calculator, not a shell.

HIDE PHOTOS AND VIDEOS

- Import and hide photos, hide videos, PDFs, Office documents and any file type.
- Files disappear from your gallery and live in an encrypted photo vault.
- Built-in viewer with pinch-to-zoom, smooth paging, video playback and document preview — no decrypted copies are ever written to disk.
- Organise with folders, tags, favourites, sorting and quick rename.
- Trash with automatic cleanup: deletions are recoverable for a short window, then gone for good.
- EXIF and GPS location tags are stripped when you export a file.

SECURITY

- AES-256 encryption for files, SQLCipher for the database, Argon2id for your PIN, keys protected by the Android Keystore.
- Calculator lock with PIN, plus optional fingerprint or face unlock.
- Automatic lock after inactivity.
- Anti-brute-force: progressive delays on wrong PINs, with an optional auto-wipe threshold you choose.
- Encrypted, password-protected backups you can store wherever you like.
- Recovery code in case you forget your PIN.

DECOY VAULT

Set a second PIN that opens a separate, harmless vault while your real one stays hidden. Unlocking runs in constant time, so the two are indistinguishable from the outside. Plausible deniability, done properly.

ENCRYPTED NOTES

A secret notes space for passwords, codes and private text, protected by the same encryption as your hidden gallery.

OFFLINE BY PRINCIPLE

Zero network requests. Zero permissions you don't need. Zero data collection. We don't run servers, so we cannot see your content even if we wanted to. If you lose both your PIN and your recovery code, nobody — including us — can recover your data. That is the whole point.

Available in English, German, Polish, Ukrainian, Spanish, Italian and French.

Keep your private things private.