Light Meter

WBPhoto

About this app

The essential light meter app for film and digital photography. Turn your phone into a precision spot meter trusted by 400,000+ photographers worldwide.

PRECISION EXPOSURE METERING
• Spot meter with tap-to-focus exposure points
• Multi-point spot metering — pin and compare dynamic range
• Zone System metering — assign zones (0–X) to readings
• Exposure preview for compensation and ND offsets
• Incident light meter via device sensor
• Volume button to start/stop metering
• Calibrated against professional Gossen and Sekonic meters

ZONE PLACEMENT CALCULATOR
• Place readings on zones, see target exposure instantly
• Grayscale swatches show how each reading renders
• Dynamic range warnings for high-contrast scenes
• Send directly to Bracket Calculator

YOUR COMPLETE PHOTOGRAPHY TOOLKIT — 12 CALCULATORS
• DOF — Hyperfocal distance, near/far focus limits
• Reciprocity — 40+ film stocks (Portra, Tri-X, HP5, CineStill, and more)
• Bracket Calculator — Exposure bracketing with custom steps
• Pinhole Calculator — Effective f-stop for pinhole cameras
• EV/LV Converter • White Balance • Bellows Factor
• Flash Guide Number • EXIF Reader • Angle of View
• Zone Placement • Sunny 16

GOLDEN HOUR & BLUE HOUR
• Sunrise, sunset, golden hour, and blue hour times

PROFESSIONAL FEATURES
• Custom ISO, shutter, f-stop ranges
• Half-stop and third-stop increments
• Shutter angle mode for cinematographers
• Live histogram • ND filter display
• Foot-candles and Lux • Exposure timer
• Screen lock to keep display awake

SAVE & ORGANIZE
• Log exposures with GPS and notes
• Hardware profiles for your gear
• Export and reference past readings

Film SLR • Medium format • Large format • Pinhole • Digital mirrorless
50+ languages • No internet required for metering

Ratings and reviews

I think it's a pretty good app. I've shot about 10 rolls of film using it and very rarely had exposure issues. I'm knocking off a point because the camera sensor is the most used app and in the top right corner. if you could sort apps I would give it 5 stars. I have a taller phone (S24 ultra) and have to use two hands to get to the camera sensor as is.

Didn't work. My phone is a galaxy s20 ultra and the numbers this app was giving me were way off. I pointed my phone at a very brightly lit space, set the f stop and iso accordingly, but the calculated shutter speed was ten seconds. I tried to fix it, but nothing I did made the app give me correct calculations. I don't know if it was a problem with my phone or the app itself, but unfortunately it's useless if it doesn't give me the right settings.

I only use it to check white balance, works well, function as described

What’s new

• Multi-Point Spot Metering
• Zone Placement Calculator
• Bracket & Pinhole Calculators
• Zone System metering
• Exposure Preview
• 20+ new film stocks
• Volume button metering
• Bug fixes & improvements