Experience a discreet privacy utility: Calculator: Secret Media Vault, from Gurukrupa Infosoft, designed to hide personal media and credentials behind a calculator guise. The app functions as a working calculator but unlocks a concealed vault when you enter a specific PIN, storing photos, videos, notes, and passwords locally and protected with AES-256-GCM encryption. It uses an SQLCipher database for text items and omits cloud sync. Android users who need on-device concealment for sensitive content are its primary audience.

Disguised front provides plausible deniability while handling media

The app presents a fully functional calculator interface that acts as a cover for the hidden storage, so casual observers see ordinary math operations. Behind that interface the vault imports photos and videos from the device gallery and keeps them separate from the main media view. In addition, the vault accepts secure notes and credential entries, letting users centralize private items that would otherwise remain visible in standard apps.

Encryption stack keeps data unreadable without local keys

The tool protects files with AES-256-GCM encryption and stores text items inside an SQLCipher-encrypted database, with keys guarded by the Android Keystore. Google Tink is implemented for the file encryption layer, and the design explicitly avoids cloud synchronization so that encrypted data stays on the device. These choices reduce the risk of external access because decrypted content requires the correct PIN and local key material.

Permission and import model enforces local-only transfers

The app requires standard media permissions to import and export files, which keeps all transfers device-local rather than routing them through remote servers. Local-only storage means no automatic upload or background syncing is performed, so users move items into the vault manually. Moreover, removing media from the main gallery on import helps keep hidden files out of casual discovery on the device itself.

Surface-level UI suits everyday use but keeps advanced controls simple

The visible calculator reduces suspicion and supports basic mathematical operations while giving straightforward access to the vault after PIN entry. Everyday users can add photos, notes, and passwords without deep technical knowledge because workflows are guided and entry fields are standard. In addition, the integrated password manager and encrypted notepad provide basic organization without requiring separate apps.

Practical for privacy-minded Android users who accept on-device-only security

The app is a practical option for individuals who want concealed, local-only storage and a calculator disguise; its architecture minimizes external exposure. The primary caveat is recovery: the app typically relies on a configured security question or recovery email to reset a forgotten PIN, and losing that recovery method can lead to irreversible loss of encrypted data.