Architectural & Security Overview
Uncompromising 100% offline privacy vault disguised as a fully functional arithmetic calculator. Enter your secret passcode to unlock an AES-256 military-grade hidden photo, video, and document vault. Features decoy fake PIN mode, face-down flip panic lock, and zero internet permissions for absolute data sovereignty.
Zero Internet Permission Required
The application manifest completely omits android.permission.INTERNET. It is physically impossible for the app to transmit data or leak photos.
Authentic Working Calculator Disguise
Operates as a responsive, real-time scientific & arithmetic calculator. Entering your secret numeric passcode followed by '=' unlocks the vault.
Military-Grade AES-256-GCM Storage
Photos, videos, and PDFs inside the vault are encrypted with 256-bit AES-GCM. Unreadable even if storage is extracted via PC.
Decoy Fake PIN Mode
Configure a secondary PIN that opens a convincing fake gallery with generic photos if you are forced to unlock the device.
Face-Down Flip Panic Lock
Placing the phone face down immediately locks the vault and returns the screen to a harmless calculator interface.
Ultra-Lightweight Footprint
Tiny 232 KB size ensures instantaneous launch, zero battery drain, and zero forensic suspicion on your app list.
Technical Specifications & Build Metadata
| Application Package | Calculator.apk |
|---|---|
| Production Version | 1.0.0 (Stable Release) |
| Target Architecture | Universal (arm64-v8a, armeabi-v7a) |
| Minimum OS Requirement | Android 6.0+ (Marshmallow to Android 15) |
| Verified Binary Size | 232 KB |
| Cryptographic Hash (SHA-256) | e2a967af921ca29ab629e3fb37310be41459e9f985978b7cf71afbd402445f4e |
| VirusTotal Clean Analysis | View Live Inspection Report → |
| Licensing Model | Cryptographic Hardware-Bound RSA Signature (Zero Email/Phone Required) |
| Telemetry & Analytics | 0 Trackers, 0 Crash Reporters, 0 Third-Party Analytics |
Installation & Cryptographic License Activation
Download & Verify
Download the APK directly above. You can verify its published SHA-256 hash or inspect the live VirusTotal clean report.
Install on Device
Tap the downloaded APK and select Install. If prompted by Android, permit "Install Unknown Apps" for your mobile browser.
Copy Device ID
Open Calculator Vault, copy your unique hardware-bound Device ID, and click Order on WhatsApp for instant RSA activation.
Frequently Asked Questions
Can anyone tell it is a vault app from the home screen?
No. The app icon displays as 'Calculator' with a standard calculator symbol. It performs regular calculations until your secret sequence is keyed in.
Can the app sync my photos to a server?
No. The app does not possess internet permission, making data transmission technically impossible.