Real EMF Detector

Measure magnetic fields with real sensor data. Real EMF Detector turns your iPhone into a precision magnetometer using the built-in calibrated magnetic field sensor to detect and measure DC magnetic fields around you.

CALIBRATED SENSOR TECHNOLOGY

• Uses Core Motion calibrated magnetic field data that removes device self-interference
• X, Y, Z axis breakdown showing directional field components
• Total field magnitude in microtesla with continuous updates
• More accurate than raw magnetometer apps that include phone hardware noise

REAL-TIME DETECTOR

• Large circular gauge with smooth animated needle
• Color-coded safety levels: Background, Normal, Elevated, Strong, Very Strong
• Instant response as you move through your environment
• Configurable threshold alerts with haptic feedback

LIVE GRAPH

• Real-time scrolling chart built with Swift Charts
• Track magnetic field changes over time as you scan
• Pinch to zoom and scroll through recorded data
• X, Y, Z axis overlay for detailed field analysis

STUD & METAL SCANNER

• Detect metal objects, pipes, and wiring behind walls
• Find studs by scanning for nail and screw patterns
• Audio and haptic feedback as field strength changes
• Sensitivity adjustment for different scanning needs

SESSION HISTORY

• Record complete measurement sessions with one tap
• Review past sessions with full statistics and timeline
• Export session data as CSV for further analysis
• Stored locally with SwiftData for fast access

LEARN & UNDERSTAND

• Educational guide to magnetic fields and EMF science
• Understand what your readings mean in everyday context
• Reference chart comparing common magnetic field sources
• Safety information based on published exposure guidelines

COMMON USES

• Home inspection: check appliances, wiring, and electrical panels
• Stud finding: locate metal fasteners behind drywall
• Education: learn about magnetism and electromagnetic fields
• Hobby and exploration: investigate unusual magnetic sources
• Workplace assessment: identify strong field areas

HONEST ABOUT LIMITATIONS Real EMF Detector measures DC magnetic fields using the iPhone magnetometer. It cannot detect RF signals, Wi-Fi, cellular (5G/4G), AC electromagnetic fields, or electric fields. For those measurements, specialized equipment is required. What it does measure, it measures well -- with calibrated data that most competing apps lack.

Built with SwiftUI, Swift Charts, and Core Motion. No ads, no data collection.

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