Calculator Lock - Hide Photos

Calculator Lock combines a functional calculator with a private, PIN-protected vault for files stored on your Android device. Use the calculator normally, or enter your secret 4-digit PIN and tap "=" to open the vault.

FUNCTIONAL CALCULATOR

Perform normal arithmetic with addition, subtraction, multiplication, division, percentages, decimals, backspace, and clear controls.

PRIVATE CALCULATOR VAULT

Create and confirm a 4-digit secret PIN. Enter the saved PIN on the calculator and tap "=" to unlock your private files.

ORGANIZE PRIVATE FILES

Use the default Pictures, Videos, and Files folders or create custom folders. Rename and delete folders, and switch between list and grid layouts.

IMPORT DEVICE FILES

Import pictures, videos, audio, and other files into app-controlled private storage. You can choose whether to delete the original file after it has been copied successfully.

VIEW AND MANAGE FILES

Preview images with zoom and swipe navigation, play videos inside the app, move files between vault folders, share supported files, move files to device storage, or delete files you no longer need.

LOCAL PRIVACY

Your PIN, settings, metadata, and private files remain on your device. The app does not require an account, cloud service, backend, or internet connection for calculator and vault functionality.

SECURITY FEATURES

The vault locks when the app is closed, backgrounded, inactive, or locked manually. Screen-capture protection helps prevent screenshots, screen recordings, and recent-app preview snapshots where supported.

PIN RECOVERY

During setup, save an answer to the security question. If you forget the PIN, enter the recovery sequence shown in the app's information guide and answer the security question to create a new PIN without deleting vault data.

KEY FEATURES

* Functional calculator
* Disguised PIN entry through the calculator
* App-private local file storage
* Default and custom vault folders
* Picture, video, audio, and file import
* List and grid layouts
* Image zoom and swipe navigation
* In-app video playback
* Move to Folder, Move to Device, share, and delete actions
* Dark and light themes
* Forgotten-PIN recovery
* Automatic vault locking
* Screen-capture protection

Important: Move important files to device storage before uninstalling Calculator Lock or clearing its app data. Uninstalling the app or clearing app data removes access to files that remain in app-private storage.