EMF Analyser is a free Android application developed by Ghost-Toolset that enables users to detect and measure electromagnetic frequency (EMF) emissions. The app is designed to measure the presence and strength of EMF emissions by utilizing the device's built-in tri-axis magnetic sensor, which is measured in microtesla. The app then combines the data, similar to popular hardware tools, to provide an easily interpretable reading on the screen.

This app is primarily used by ghost hunters to identify fear cages, spirits, ghosts, and entities, and unexplainable paranormal activity. It offers several features such as real-time EMF readings, numeric display, strength bar, beeping gauge, graph to identify anomalies, calibration to remove background noise, and an elegant/simple design for ease of use.