Light Meter

WBPhoto

About this app

The essential light meter app and exposure calculator for film and digital photography. Turn your phone into a precision spot and incident exposure meter trusted by 400,000+ photographers worldwide to nail the perfect exposure, every time.

PRECISION EXPOSURE METERING
• Spot meter - Measure precise exposure points through your camera
• Incident light meter - Measure ambient light falling on your subject via device sensor
• Calibrated and tested for accuracy against professional Gossen and Sekonic meters

YOUR COMPLETE MANUAL PHOTOGRAPHY TOOLKIT
Master manual mode with this powerful suite of 9 calculators:
• Depth of Field (DOF) - Hyperfocal distance, circle of confusion, near/far limits
• Reciprocity Calculator - Long exposure compensation for film photography (Portra, Tri-X, Delta 100, Ektar, HP5, and more). Essential for analog photography.
• EV/LV Converter - Convert between Exposure Value and Light Value systems
• White Balance Meter - Color temperature in Kelvin and Mired
• Bellows Factor - Exposure compensation for macro photography and extension tubes
• Flash Guide Number - Calculate flash power, distance, and aperture relationships
• Sunny 16 Calculator - Classic manual exposure reference
• EXIF Reader - Extract metadata and exposure settings from photos
• Angle of View - Calculate field of view for any lens and sensor combination

GOLDEN HOUR CALCULATOR
• Magic hour times: sunrise, sunset, golden hour, and blue hour
• Plan your landscape and portrait photography shoots with precision

BUILT FOR THE DEMANDING PROFESSIONAL
• Custom ISO, shutter speed, and f-stop ranges
• Half-stop and third-stop increments
• Shutter angle mode - cine meter features for filmmakers and cinematographers
• Live histogram display
• ND filter display options
• Foot-candles and Lux readout
• Built-in exposure timer for long exposures
• Screen lock to keep display awake

SAVE & ORGANIZE YOUR WORK
• Save exposures with GPS coordinates and notes
• Hardware profiles - save camera/lens specs to automatically constrain meter output to your gear's capabilities
• Reference past readings anytime

WORKS WITH ANY MANUAL CAMERA
Film SLR • Medium format • Large format • Pinhole cameras • Cinematographic • Digital mirrorless

50+ languages • No internet required for metering

YOUR CREATIVE PARTNER
Whether you're a seasoned filmmaker, dedicated analog enthusiast, or mastering your first manual camera, Light Meter is the only exposure tool you'll ever need. Download now and take confident control of every shot.

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.

Fantastic. Really useful. My phone is about 0.5 of a stop off. Would be great to have a separate calibration setting, so that the plus/minus correction could just be used for working out placing the image in a particular zone etc, but hardly any inconvenience as is. A great app, love the spot meter zoomed in - super accurate. Other thoughts: if it could perform a screen grab to act as a reference, that would be cool for image review. Thank you for your work on this.

What’s new

• Add option to remember camera zoom per camera
• Add Angle of View calculator
• Add Home Screen configuration
• Add additional localizations
• Bug fixes
• Performance improvements
• Style updates