Calculator Private Lock is a 100% offline security tool designed to keep your private photos, videos, documents, and notes hidden behind a fully functional calculator interface. On the outside, it operates as a standard calculator, but entering your secret PIN and pressing "=" opens a military-grade encrypted vault.

To protect your privacy further, it also includes an App Locker to guard your installed apps (like WhatsApp, Gallery, and Settings) from unauthorized access.

Key Features:

Smart Calculator Lock
• Appears as a normal calculator for calculation.
• Enter your secret 4 or 6-digit PIN and press "=" to access your hidden vault.

Encrypted Media Vault (Photos & Videos)
• Import personal photos, videos, and albums into the vault.
• Uses AES-256 encryption to secure your media files locally.
• View photos and play videos directly inside the secure built-in player.

Document Locker
• Hide and secure PDF, DOC, TXT, XLS, and other files.
• Protect important documents from being seen by others.

Private Notes
• Create, edit, and store confidential notes, passwords, or personal diaries.
• All notes are fully encrypted and stored securely on your device.

Advanced App Lock
• Lock sensitive apps (WhatsApp, Instagram, Gallery, Settings, Gmail).
• Prevents unauthorized access using a secure PIN or Pattern lock.

Decoy Vault (Fake Password)
• Supports a Fake PIN that opens a secondary decoy vault.
• If someone forces you to open the app, enter the Fake PIN to show a blank vault.

Biometric Unlock
• Support for Fingerprint unlock to access the vault quickly and securely.

Screenshot Protection
• Restricts screenshots inside the vault to prevent accidental exposure.

100% Offline & Private
• The app requires no internet access. Your files, PINs, and notes never leave your device.
• Complete privacy without cloud storage risks.

IMPORTANT WARNING:
Since this app is 100% offline, all files are stored strictly on your device. If you uninstall the app or clear its data, all locked files will be permanently deleted. Please make sure to export your files back to the system gallery before uninstalling or formatting your phone.