LxMeter

Turn your phone into a professional light measurement instrument with LxMeter, the comprehensive metering app designed for photographers, cinematographers, and lighting professionals. This trial version gives you access to essential measurement tools that transform your device into a powerful diagnostic platform for precise exposure control and light analysis.

Measure illuminance across an impressive range from 0.1 to 3,000,000 lux using the integrated lux meter function. Switch to exposure meter mode for incident and reflected light readings that help you determine optimal camera settings in real time. The app intelligently calculates the perfect aperture value when you input ISO speed and exposure time, or works in reverse to show shutter speed when aperture is set. Seamlessly toggle between shutter speed priority, aperture priority, and manual modes while monitoring the real-time exposure level indicator to nail your shot every time.

Specialist photographers will appreciate the dedicated flash meter capability, which measures flash output and displays the percentage of flash contribution to total exposure. The spot meter mode handles landscapes and distant objects with precision, measuring luminance in candelas per square meter or foot-lamberts while simultaneously capturing correlated color temperature (CCT) data. This makes it ideal for architectural photography, outdoor work, and any situation requiring accurate measurement of specific areas rather than broad readings.

Lighting professionals and technicians benefit from the advanced flicker analysis tool, which evaluates light source performance according to IEEE 1789 standards. Detect harmonic content up to 30 kHz, view the complete frequency spectrum, and access industry-standard parameters like Flicker Index, Percent Flicker, and SVM values—features typically found only in expensive standalone equipment.

The color meter provides CIE chromaticity diagrams and color temperature measurements across the full spectrum. ND filter compensation ensures accurate readings even when using neutral density filters, while the versatile light input selector works with external SS04 sensors for maximum accuracy or your phone's built-in light sensor for convenient field measurements.

Organize your work efficiently with the integrated archive system. Save measurements, add detailed notes, and automatically tag each entry with exposure data and location information. Reference your personal archive later when planning or executing final shots on new projects.

LxMeter supports professional measurement conventions including EV values at ISO 100, foot-candles, 1/2 and 1/3 stop resolution for aperture and shutter speed, and cine/video exposure settings with frame rate and shutter angle options. A comprehensive user manual is included in multiple languages, and professional support is available through the developer for questions about upgrading to the full feature set.