Calculator - SecureVault
Android app by CodeHorizon. Productivity · CodeHorizon
- Store rating
- Unknown
- Store rating count
- Unknown
- Download price
- 0.75 USD
- In-app purchases
- Not listed in captured metadata
- Version
- 7.0
- Listing last refreshed
- 2026-09-13
View the original store listing
Store description excerpt
Calculator – SecureVault: Scientific Calculator with Zero‑Knowledge Secure File Vault Turn your Android device into a dual‑purpose tool: a full scientific calculator on the surface, and a deeply secure, offline file vault underneath. -- POWERFUL CALCULATOR • Complete scientific calculator: trigonometric, logarithmic, exponential, percentage, and power functions • Real‑time expression preview with correct order of operations and parentheses support • Calculation history with easy swipe‑to‑delete and one‑tap result reuse • Quick copy of results to clipboard and auto‑scaling display for long expressions -- STRONG, LOCAL‑ONLY ENCRYPTION • AES‑256‑GCM file encryption for photos, videos, documents, and any other file type • Encryption keys protected by Android Keystore with hardware‑backed storage where available • Zero‑knowledge design: only your passcode/biometrics can unlock files, never stored in plain text • Configurable 4–8 digit passcode plus optional biometric unlock (fingerprint/face, depending on device) • Hidden calculator trigger code to open the vault from the normal calculator interface -- PRIVACY & STEALTH FEATURES • Optional protections: hide from recent apps and block screenshots in sensitive screens • Automatic return to the calculator UI to keep the vault hidden in plain sight • Encrypted filenames and metadata so contents can’t be guessed from file names • Local‑only storage: no cloud sync, no external servers, and no third‑party analytics -- SECURE FILE MANAGEMENT • Import and encrypt existing photos, videos, documents, and other files into secure folders • Organize content with folders and intuitive file actions inside the encrypted space • Fast, on‑device decryption when you open files; re‑encrypted immediately when you’re done • Auto‑lock after inactivity so the vault closes even if you forget -- MODERN, ACCESSIBLE DESIGN • Clean Material Design 3 interface with dynamic colors that adapt to your system theme • Light and dark modes, smooth transitions, and attention to readability • Optimized layouts for one‑handed use and larger displays -- 100% OFFLINE, ZERO DATA COLLECTION • Works fully offline – no account, no registration, no network required • No tracking, analytics, or hidden connections: the app does not send your data anywhere • All encryption and decryption happens entirely on your device -- PERMISSIONS • Storage / media access: used only to encrypt and decrypt files you select • Biometric: used only to unlock the vault as an alternative to your passcode • No internet or location permission required Ideal for students, professionals, and privacy‑focused users who want a capable calculator on the surface and a secure file vault underneath. Important: If you forget your passcode and recovery options, your encrypted files cannot be recovered. Always keep separate backups of irreplaceable data.
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