Calculator Vault — Hide Photos

Calculator Vault is a real scientific calculator that hides a private, encrypted photo vault. Type your secret PIN on the calculator keypad and press = — your hidden photos, videos, audio, documents and notes open. Anyone else who picks up your phone sees only a working calculator. This is a vault app, and we say so openly: the disguise is for the people around you, not for you.

A REAL CALCULATOR
• Standard and scientific modes with correct operator precedence
• Trigonometry, logarithms, powers, roots, factorials, memory keys and history
• Works properly in landscape, at large font sizes, and with TalkBack

A PRIVATE, ENCRYPTED VAULT
• Hide photos, videos, audio, documents and private notes
• Real AES-256 encryption — your files are never just renamed or moved
• Your PIN never leaves the device; keys are derived from it on your phone
• Files are decrypted in memory only — plaintext is never written to storage
• Videos and audio play directly from the encrypted file
• Import from your gallery, the file picker, share from another app, or shoot straight into the vault with the in-app camera
• Nested folders, favourites, search, sort, and a 30-day recycle bin
• Fingerprint unlock, bound to the encryption key itself — not to a yes/no check

IF SOMEONE MAKES YOU OPEN IT
• Decoy vault: a second PIN opens a separate vault that looks identical
• Optional intruder photo: a failed unlock quietly snaps whoever tried
• A log of failed unlock attempts

IF YOU LOSE YOUR PHONE OR DELETE THE APP
• Durable vault (Premium): keep an encrypted copy in a folder you choose — on your device, SD card, or a folder your own cloud app syncs — that survives uninstalling the app
• Restoring from that folder is free forever, on any device, with your PIN or your recovery key

YOUR FILES ARE ALWAYS YOURS
Export and unhide are free forever, with no cap on how much you can protect. We will never hold your photos hostage behind a paywall: the paid upgrade adds protection, it never ransoms what you already stored.

NO ACCOUNT. NO CLOUD OF OURS. NO TRACKING.
There is no sign-up and no server of ours anywhere in this app. Your files, filenames and albums never reach us. We collect no analytics.

PLEASE READ — REAL ENCRYPTION HAS A REAL CONSEQUENCE
Only you hold the key. If you lose both your PIN and your recovery key, your files cannot be recovered by anyone, including us. Write down your recovery key when you set up the vault.

PREMIUM (optional in-app purchase)
• Removes ads — for Premium users the ad code is never even loaded
• Unlocks the durable vault
The free version shows ads and uses only the advertising ID for them, with consent where the law requires it. Everything else works free, forever.

Ready to keep private things private? Install Calculator Vault, set your PIN, save your recovery key, and hide your first photo in under a minute.