Hidden in plain sight.
Disguised as a real, functional calculator. No second app, no toggled icon, no hidden gesture that gives it away.
CoverA fully working calculator that secretly hides your private photos, videos and notes — behind a PIN only you know.
Closed testing — join the Testers group first, then opt in. Coming soon to Google Play.
The cover is a real calculator that solves real math. The vault only opens for the exact PIN you set.
Hand the phone to a friend or a border agent. They see a calculator. It does what a calculator does.
Your PIN is just a number. No special menu, no long-press, no telltale icon to find.
Photos, videos and notes — decrypted only in memory, only while you're here. Lock the app and they're gone.
Cover, encryption, and recovery — designed together so any one of them can be wrong without losing your data.
Disguised as a real, functional calculator. No second app, no toggled icon, no hidden gesture that gives it away.
CoverStrong encryption derived from your PIN. Nothing readable is ever written to disk — not thumbnails, not previews, not metadata.
EncryptionOrganize into encrypted folders. Open, view, edit a note, watch a clip — everything happens inside the vault.
ContentBack up to your own Google Drive. The encryption key is derived from your PIN — even Google can't read what's inside.
BackupScreenshots and screen-recording are blocked inside the vault. Switch apps and it auto-locks back to the calculator.
DefenseRecovery email plus a security question plus a one-time cipher you save — so a forgotten PIN doesn't mean a lost vault.
RecoveryFrom the cover that anyone can see, through the encrypted folders and the note editor only you can.
No subscription. The free version is ad-supported; Premium is a single payment, yours forever.
Enough for a personal-document vault. Ads keep the lights on while we're in beta.
Ad-supported.
For anyone serious about backing up a real archive. No subscription, ever.
Pay once. Use forever, on any device you log in to.
Calculator Vault is in closed testing on Google Play. Three short steps and you're in — keep the app installed so the test counts.
Sign in with the Google account on the Android device you'll use, then accept the invite.
Open testers groupFrom the same account, accept the closed-test invite on Google Play.
Opt in on PlayOnce you're opted in, the Play listing becomes installable from the same account.
Install on PlayNote — complete all three steps with the same Google account, and keep the app installed for the test to count.
Short, factual answers about how Calculator Vault works, what it costs, and what happens to your data.
Calculator Vault is a free Android app that looks and works like a normal calculator while hiding an encrypted vault for private photos, videos and notes, unlocked by a secret PIN.
Enter your secret PIN on the calculator and press =. The calculator face slides away and the encrypted vault opens.
Recovery is multi-step. First, the security question you set during setup. If that fails, a developer-assisted reset is available — email support@nova-soft.uk.
On your device, encrypted with AES-256. Nothing readable is ever written to disk — not thumbnails, not previews, not metadata.
Yes. Calculator Vault works fully offline. Cloud backup is optional and only used when you turn it on.
Backups go to your own Google Drive, encrypted with a key derived from your PIN. Only you can restore them — Google itself cannot read the contents.
No. A wrong PIN just shows a normal calculator result. There's no telltale icon, hidden gesture or secret menu — it is a real, working calculator until the correct PIN is entered.
Yes — free with ads. A one-time Premium purchase removes ads and unlocks unlimited folders and unlimited files. No subscription, ever.
Android 8.0 (API level 26) or newer.