Construction Calculator Pro 2 vs Privacy Vault

The ultimate construction calculator trusted by contractors, builders, and tradespeople worldwide. All the calculations you need on the job site - working 100% offline without expensive subscriptions. EVERYTHING YOU NEED, NOTHING YOU DON'T - 10 Professional Calculators in One App - Works Offline - No Internet Required - US & European Standards (ACI, ASTM, Eurocode) - One-Time Purchase - NO MONTHLY FEES! COMPLETE CALCULATOR SUITE - Concrete Calculator - Volume, bags, mix ratios - Brick & Block - Quantity, mortar, patterns - Tile Calculator - Coverage, adhesive, grout - Paint Estimator - Coverage, coats, primer - Steel Rebar - Quantity, weight, spacing - Wood/Lumber - Board feet, joists, loads - Insulation - R-value, U-value, thickness - Stairs - Rise, run, stringers, code compliance - Roofing - Area, shingles, underlayment - Plumbing - Pipe sizing, slope, flow rates BUILT FOR THE FIELD Unlike desktop software or subscription apps that fail without internet, Construction Calculator Pro works everywhere - basements, new construction sites, remote locations. Your calculations, your device, no strings attached. PROFESSIONAL FEATURES - Quick Unit Conversion - Metric/Imperial toggle - Photo Integration - Document measurements - Save Calculations - Build project histories - PDF Reports - Professional estimates - Material Lists - Automated quantities - Cost Estimation - Track project budgets - Building Codes - US & EU standards WHO USES THIS APP - General Contractors - Estimate entire projects - Concrete Contractors - Calculate pours accurately - Framers - Determine lumber and fasteners - Electricians - Load calculations, wire sizing - Plumbers - Pipe sizing and slope calculations - DIY Enthusiasts - Professional results at home - Construction Students - Learn with real tools REAL FIELD TESTING Developed with input from actual contractors who were tired of: - Paying $50+/month for basic calculators - Apps that don't work without internet - Using 10 different calculators - Desktop software that's not mobile - Inaccurate free calculators KEY ADVANTAGES - Accuracy - Formulas based on industry standards - Speed - Quick access to any calculator - Reliability - Works anywhere, anytime - Value - One price for all features - Updates - Free updates with new features TECHNICAL SPECIFICATIONS - Supports both US (Imperial) and Metric units - Complies with latest building codes - Works on all iPhones and iPads (iOS 16+) - Optimized for one-handed operation - No account required - No data collection Join thousands of professionals who've eliminated subscription costs while getting better tools. Stop paying monthly for calculations you need daily. Buy once. Build forever.

## Your Digital Privacy Guardian Privacy Vault is a professional-grade private file management application designed specifically for iOS. It employs military-grade AES-GCM encryption technology to provide bank-level security protection for your sensitive files. ## Core Functions ### Military-Grade File Encryption * AES-GCM Encryption Algorithm: Military-grade encryption standard using a 256-bit key. * PBKDF2-SHA256 Key Derivation: 100,000 iterations to ensure password security. * Random Salt Generation: Generates a 32-byte random salt for each encryption, preventing rainbow table attacks. * Individual File Passwords: Each file can have an independent password for double protection. ### Multiple Unlocking Methods * Face ID / Touch ID: Biometric unlocking. * Numeric Password: Supports strong password strategy verification. * Smart Authentication: Automatically selects the best unlocking method based on device capabilities. ### Comprehensive File Management * Multi-Format Support: Supports all formats including images, videos, documents, and audio. * Folder Management: Create, rename, move, and delete folders. * Batch Operations: Batch encryption, decryption, move, and rename. * Smart Search: Multi-condition search and tag system. ### Convenient Import Function * File Import: Supports importing all file types. * **Photo Import:** Batch import of multiple photos and videos. * **Photo Import:** Directly capture and save photos to the vault. * **Keep Original Names:** Automatically preserves original filenames. ### Secure Preview System * **Encrypted File Preview:** Preview encrypted content by entering a password. * **Multi-Format Support:** Preview images, videos, PDFs, and audio. * **Temporary Decryption:** Automatically cleans up temporary files after previewing. * **QuickLook Integration:** System-level preview experience. ### NAS Network Storage Support * **Multi-Protocol Support:** Supports three mainstream network storage protocols: SMB, FTP, and WebDAV. * **Quick Connection:** One-click connection to home NAS, enterprise file servers, and cloud storage services. * **Secure Transfer:** Supports encrypted connections (SMB encryption, FTP over SSL/TLS, HTTPS). * **File Synchronization:** Supports downloading files from the NAS to the local vault or uploading encrypted files to the NAS. * **Online Browsing:** Directly browse NAS files and preview them without downloading. * **Password Management:** Automatically saves connection passwords to the Keychain for security and convenience. * **Multi-Server Management:** Supports simultaneous connection to multiple NAS devices. Server Switching, Fast ### Personalization * Theme System: Multiple preset themes and custom colors * Interface Enhancement: Modern UI design, smooth animations * Storage Monitoring: Real-time disk space usage * Statistics: File count, encryption status statistics ## Security Features * Local Storage: All data is stored locally, never uploaded to third-party servers * Sandbox Protection: Strictly adheres to iOS sandbox security mechanisms * Memory Protection: Sensitive data is immediately cleared after use * Background Lock: App automatically locks for protection when entering the background ## Applicable Scenarios * Personal Privacy: Protection of private photos, videos, and documents * Business Documents: Encryption of contracts, agreements, and financial statements * Learning Materials: Management of important notes, certificates, and documents * Creative Works: Protection of design drafts, code, and creative documents ## Why Choose Us * Professional-Grade Encryption: Uses bank-grade AES-GCM encryption algorithm * Multiple Protections: Biometric identification, digital passwords * User-Friendly: Modern interface, simple and intuitive operation * Privacy First: Local storage, never uploaded to third-party servers * Continuous updates: Regular updates and continuous optimization of the user experience.