Light Meter by WBPhoto

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

• 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

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 • Home screen and lock screen widgets • No internet required