Thorlabs OPM Mobile vs EMF Scan

The Thorlabs OPM Mobile is designed to remote control the PM6x series handheld optical power meters via Bluetooth® connection. This application allows the user to read the optical power from a large 4 digit display. It also features a graph view to monitor the power over time. Basic settings like wavelength correction and zeroing can be performed directly from your mobile device. Supported Thorlabs Power Meters - PM61 - PM100D3

Measure electromagnetic fields (EMF) in real time using your smartphone's built-in magnetic sensor. [Key Features] • Real-time magnetic field strength display (switch between µT / mG) • Automatic saving of measurement data and history management • Map view of measurement locations • Sound alarm (volume changes with field strength) • Color themes (11 in total — dark and light pastel) • Ad-removal option (one-time purchase; also unlocks some color themes) [Great For] • Anyone concerned about magnetic fields around home appliances or power lines • Anyone who wants an easy alternative to a dedicated EMF meter • Anyone who wants to record and manage measurement data * This app uses your smartphone's magnetic sensor. Its accuracy differs from that of a dedicated measuring instrument.