CalcLockCalcLock
Just a calculator.
Until you know
the equation.
A real calculator with encrypted photo vaults behind your exact equation. One tap of equals gives the answer. A second opens your space.
On your iPhone. No account required.
Your photo space
A space
of your own.
A place for the photos you choose to keep separate.
Your equation. Your device. Your vault.
The app combines the exact equation with a secret generated on the device, then runs it through key-derivation steps before using AES-256-GCM to encrypt the vault’s files and their names.
So two equations with the same answer, like 123+123 and 200+46, produce different keys and open different vaults.
That device secret is stored in the iPhone’s Keychain and doesn’t sync to another device.
It also means that forgetting the equation or losing the device means losing access: there’s no recovery or portable backup.
Security details ›