Transform your iPhone into a professional-grade protractor with precision angle measurement capabilities.

Protractor is a cutting-edge angle measurement application that leverages your device's advanced motion sensors to deliver laboratory-grade accuracy. Whether you're a professional engineer, architect, educator, or DIY enthusiast, this app provides the precision tools you need for any angle measurement task.

Key Features:

High-Precision Measurement
• Multi-axis measurement system (Roll, Pitch, Yaw)
• Real-time angle detection with 0.1-second update rate
• Adjustable precision from 0–3 decimal places
• Full 360° measurement range with smart normalization

Smart Calibration System
• Automatic calibration with stability detection
• Manual calibration with reference angle input
• Multi-point calibration for enhanced accuracy
• Environmental adaptation for temperature and magnetic field changes

Professional Tools
• Visual protractor with traditional design
• Compass mode for professional applications
• Preset angle markers (0°, 15°, 30°, 45°, 60°, 90°, etc.)
• Advanced angle calculator with trigonometric functions

Data Management
• Session-based measurement recording
• Project organization and management
• Export data in JSON and CSV formats
• System-wide sharing capabilities

Rich Feedback System
• Multi-sensory feedback (sound, haptic, visual)
• Customizable preset angle notifications
• Professional angle classification (acute, right, obtuse, etc.)
• Real-time device orientation display

Advanced Analytics
• Statistical analysis (average, min, max, standard deviation)
• Time-based trend analysis
• Data visualization with charts and graphs
• Multi-session comparison tools

Perfect for:
• Engineers and architects for precise measurements
• Educators for teaching geometry and trigonometry
• Students for mathematics and physics studies
• DIY enthusiasts for home improvement projects
• Professionals requiring accurate angle verification

Technical Excellence
• Built with SwiftUI for modern iOS experience
• CoreMotion integration for sensor accuracy
• Optimized for battery efficiency
• Universal device compatibility
• Accessibility features included

Download Protractor today and experience the future of angle measurement on your iPhone!