Calculator — Open Source Password Manager App

Calculator Hide File App is a smart Android app that looks and works like a regular calculator but secretly functions as a secure file vault. Keep your private images, videos, documents, and other files safe with a hidden passcode while enjoying a fully functional calculator interface.

Key Features:

• Dual Functionality: A real calculator that doubles as a hidden file vault.
• Secret Passcode: Unlock your hidden files with a private code only you know.
• Secure File Manager: Hide, unhide, and organize your files easily and safely.
• Fast & Lightweight: Smooth performance on all Android devices.
• No Root Required: Fully functional without rooting your device.
• File Encryption: Protect your hidden files with strong encryption.

Why Choose Calculator Hide File App?

• Completely secure and discreet – no one will suspect your files are hidden.
• Works like a normal calculator while keeping your private files safe.
• Supports images, videos, documents, and other file types.
• Open-source and transparent – you can inspect the code yourself to ensure your privacy.

How It Works:

1. Use as a Regular Calculator: Perform standard arithmetic operations without revealing the hidden vault.
2. Enter Secret Passcode: Type your code and press "=" to access your hidden files.
3. Manage Hidden Files: Add, remove, and organize files safely. Files remain protected even after closing the app.

Requirements:

• Android 6.0 or higher
• Storage permissions enabled
• “Manage All Files” permission for Android 11+ devices

Technologies Used: Kotlin, XML, Secure internal storage & MediaStore API

Why You’ll Love It: Keep your files completely hidden, enjoy a real calculator interface, and benefit from an open-source, lightweight, and secure app. Protect your privacy with ease!