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 AR RANGEFINDER • Point at your subject, read distance in feet or meters • Perfect for manual focus film cameras with no built-in rangefinder • LiDAR precision on iPhone Pro (centimetre accuracy up to 5 m) • ARKit scene tracking on all other supported iPhones • Precise mode for the exact number; Zone mode for macro/near/mid/far • Send readings directly into the Depth of Field Calculator YOUR COMPLETE PHOTOGRAPHY TOOLKIT — 13 CALCULATORS • Rangefinder — AR subject-distance measurement • 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