Calculator Vault

Calculator Vault & AppLock is the ultimate privacy protection app that disguises itself as a fully functional calculator. No one will ever know you're hiding sensitive files behind a simple math app.
DISGUISE MODE
A complete working calculator with support for +, -, ×, ÷, %, and decimal operations. Enter your secret PIN on the calculator keypad to unlock your private vault. The app looks and acts like a normal calculator — perfect for blending in.
HIDDEN PHOTO & VIDEO VAULT
Import photos and videos from your gallery or capture them directly with the in-app camera. All files are encrypted and stored securely inside the app's private storage — completely hidden from your device gallery, file managers, and other apps. View, share, or permanently delete media from within the vault.
SECRET NOTES
Save passwords, PINs, private journal entries, and confidential notes. All notes are encrypted and stored securely. Create, edit, and delete notes with a simple tap.
INTRUDER DETECTION
When someone enters the wrong PIN, the app silently captures their photo using the front-facing camera. Every failed attempt is logged with date, time, and the entered code. Review all intrusion attempts in the security logs.
DECOY VAULT MODE
Set up a separate decoy PIN that opens an alternate vault showing only harmless files. Perfect for situations where you're forced to unlock your phone under duress.
CALCULATOR THEMES
Choose from three built-in themes: Slate Dark (default), Matrix Green, and Cyberpunk Violet. Customize the calculator appearance to match your style.
PRECISION CALIPER TOOL
Bonus utility — a fully functional on-screen caliper for measuring real-world objects in millimeters or inches. Includes PPI calibration using a credit card or US quarter as reference.
100% OFFLINE & PRIVATE
All data is stored exclusively on your device. No accounts, no sign-ups, no data collection, and no internet connection required. Your privacy is guaranteed.
KEY FEATURES:
• Fully functional calculator disguise
• Secret photo and video vault
• Encrypted private notes
• Intruder selfie capture
• Decoy vault mode
• 3 calculator themes (Slate Dark, Matrix Green, Cyberpunk Violet)
• PIN-based access (4-digit)
• Biometric unlock support
• Precision caliper measurement tool
• Intruder security logs with timestamps
• 100% offline — no data ever leaves your device
• Free with optional ads
PERMISSIONS:
• Camera — for capturing photos inside the vault and intruder detection
• Internet — for serving ads (no personal data collected)
Download Calculator Vault & AppLock today and take control of your privacy.