PRIVATE BY DESIGN • BUILT FOR iPHONE

Your Private Digital Sanctuary. Hidden in Plain Sight.

A real calculator on the surface. A discreet personal vault behind your passcode—built to keep private photos, videos, notes, passwords, contacts, and browsing separate from everyday view.

Coming to the App StoreTry the disguise ↓

1991

Website demo code
Enter 1991, then tap %.

HiCalculator

Nothing entered here is stored or sent.

Your vault stays on your iPhone.

User-controlled iCloud.

Private content is not uploaded to servers operated by HiCalculator.

ONE DISCREET APP. MANY PRIVATE SPACES.

Privacy that blends into everyday life.

HiCalculator works as a calculator until your passcode opens the space behind it.

Camouflage that works

Use a functional calculator every day. Your passcode and the % key reveal the private vault behind it.

More than a photo vault

Keep photos, videos, notes with attachments, passwords, and private contacts together on your iPhone.

Decoy Vault

A separate passcode can open an isolated space while your main vault remains out of view.

Private browsing

Keep sensitive tabs and bookmarks separate instead of mixing them into Safari history.

Security awareness

Auto-lock, failed-attempt records, and security reports add visibility around access.

Encrypted backup

Create a password-protected backup locally, then export it or optionally copy it to your personal iCloud.

RECOVERY UNDER YOUR CONTROL

User-controlled iCloud

Off until you enable it. HiCalculator encrypts the backup on your iPhone before copying it to your personal iCloud account.

Opt in only. Nothing is copied until you turn it on.
Encrypted before upload. Your backup password is required to open the archive.
No developer recovery key. HiCalculator cannot access or recover your archive.

WHY HICALCULATOR EXISTS

Privacy is a boundary—not a luxury.

Personal devices should leave room for personal space. HiCalculator keeps that boundary quiet: a useful calculator in public, a private vault only when you ask for it.

Use the essentials for free. Pro expands limits, unlocks Decoy Vault, encrypted backup and restore, private bookmarks, attachments, security reports, and an ad-free experience. Purchases are managed through the App Store with RevenueCat.

TRANSPARENT BY DEFAULT

Important information, in its own place.

Read how HiCalculator handles privacy, what applies when you use the app, or contact us directly for support.