Light Meter by WBPhoto5.3.2 - App Store

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

Version History • Add AR Rangefinder — measure subject distance for manual film cameras (LiDAR on iPhone Pro; ARKit on all others)
• Send rangefinder readings directly into the Depth of Field Calculator
• Add Multi-Point Spot Metering — long-press to pin and compare exposure readings
• Add Zone Placement Calculator — place readings on zones, see target exposure
• Add Bracket Calculator for exposure bracketing
• Add Pinhole Calculator for pinhole cameras
• Add Share as Image for social sharing
• Add Zone System metering for camera meter
• Add Exposure Preview for adjust and ND offsets
• Add 20+ new film stocks to reciprocity calculator
• Add volume button to start/stop metering
• Updated camera meter UI with icon controls
• Quick settings access from meter screens
• Refreshed settings design
• Bug fixes and performance improvements 5.3.2 Sep 7 • Add AR Rangefinder — measure subject distance for manual film cameras (LiDAR on iPhone Pro; ARKit on all others)
• Send rangefinder readings directly into the Depth of Field Calculator
• Add Multi-Point Spot Metering — long-press to pin and compare exposure readings
• Add Zone Placement Calculator — place readings on zones, see target exposure
• Add Bracket Calculator for exposure bracketing
• Add Pinhole Calculator for pinhole cameras
• Add Share as Image for social sharing
• Add Zone System metering for camera meter
• Add Exposure Preview for adjust and ND offsets
• Add 20+ new film stocks to reciprocity calculator
• Add volume button to start/stop metering
• Updated camera meter UI with icon controls
• Quick settings access from meter screens
• Refreshed settings design
• Bug fixes and performance improvements 5.3.1 Aug 18 • Add Multi-Point Spot Metering — long-press to pin and compare exposure readings
• Add Zone Placement Calculator — place readings on zones, see target exposure
• Add Bracket Calculator for exposure bracketing
• Add Pinhole Calculator for pinhole cameras
• Add Share as Image for social sharing
• Add Zone System metering for camera meter
• Add Exposure Preview for adjust and ND offsets
• Add 20+ new film stocks to reciprocity calculator
• Add volume button to start/stop metering
• Updated camera meter UI with icon controls
• Quick settings access from meter screens
• Refreshed settings design
• Bug fixes and performance improvements 5.2.1 May 29 • Add Multi-Point Spot Metering — long-press to pin and compare exposure readings
• Add Zone Placement Calculator — place readings on zones, see target exposure
• Add Bracket Calculator for exposure bracketing
• Add Pinhole Calculator for pinhole cameras
• Add Share as Image for social sharing
• Add Zone System metering for camera meter
• Add Exposure Preview for adjust and ND offsets
• Add 20+ new film stocks to reciprocity calculator
• Add volume button to start/stop metering
• Updated camera meter UI with icon controls
• Quick settings access from meter screens
• Refreshed settings design
• Bug fixes and performance improvements 5.1.5 May 11 • Add Multi-Point Spot Metering — long-press to pin and compare exposure readings
• Add Zone Placement Calculator — place readings on zones, see target exposure
• Add Bracket Calculator for exposure bracketing
• Add Pinhole Calculator for pinhole cameras
• Add Share as Image for social sharing
• Add Zone System metering for camera meter
• Add Exposure Preview for adjust and ND offsets
• Add 20+ new film stocks to reciprocity calculator
• Add volume button to start/stop metering
• Updated camera meter UI with icon controls
• Quick settings access from meter screens
• Refreshed settings design
• Bug fixes and performance improvements 5.1.4 May 2 • Add Multi-Point Spot Metering — long-press to pin and compare exposure readings
• Add Zone Placement Calculator — place readings on zones, see target exposure
• Add Bracket Calculator for exposure bracketing
• Add Pinhole Calculator for pinhole cameras
• Add Share as Image for social sharing
• Add Zone System metering for camera meter
• Add Exposure Preview for adjust and ND offsets
• Add 20+ new film stocks to reciprocity calculator
• Add volume button to start/stop metering
• Updated camera meter UI with icon controls
• Quick settings access from meter screens
• Refreshed settings design
• Bug fixes and performance improvements 5.1.3 Apr 16 • Add Multi-Point Spot Metering — long-press to pin and compare exposure readings
• Add Zone Placement Calculator — place readings on zones, see target exposure
• Add Bracket Calculator for exposure bracketing
• Add Pinhole Calculator for pinhole cameras
• Add Share as Image for social sharing
• Add Zone System metering for camera meter
• Add Exposure Preview for adjust and ND offsets
• Add 20+ new film stocks to reciprocity calculator
• Add volume button to start/stop metering
• Updated camera meter UI with icon controls
• Quick settings access from meter screens
• Refreshed settings design
• Bug fixes and performance improvements 5.1.2 Apr 14 • Add Multi-Point Spot Metering — long-press to pin and compare exposure readings
• Add Zone Placement Calculator — place readings on zones, see target exposure
• Add Bracket Calculator for exposure bracketing
• Add Pinhole Calculator for pinhole cameras
• Add Share as Image for social sharing
• Add Zone System metering for camera meter
• Add Exposure Preview for adjust and ND offsets
• Add 20+ new film stocks to reciprocity calculator
• Add volume button to start/stop metering
• Updated camera meter UI with icon controls
• Quick settings access from meter screens
• Refreshed settings design
• Bug fixes and performance improvements 5.1.1 Apr 9 • Add option to remember camera zoom per camera
• Add Mired support for white balance
• Add Angle of View calculator
• Add Home Screen configuration
• Add additional localizations
• Bug fixes and performance improvements 4.9.1 Mar 15 • Add option to remember camera zoom per camera
• Add Mired support for white balance
• Add Angle of View calculator
• Add Home Screen configuration
• Add additional localizations
• Bug fixes and performance improvements 4.8.4 Mar 8 • Add option to remember camera zoom per camera
• Add Mired support for white balance
• Add Angle of View calculator
• Add Home Screen configuration
• Add additional localizations
• Bug fixes and performance improvements 4.8.2 Mar 7 • Add Mired support for white balance
• Add Angle of View calculator
• Add Home Screen configuration
• Add additional localizations
• Bug fixes and performance improvements 4.7.4 Mar 6 • Add Mired support for white balance
• Add Angle of View calculator
• Add Home Screen configuration
• Add additional localizations
• Bug fixes and performance improvements 4.7.2 Mar 3 Added Flash Guide calculator 4.4.1 11/22/2025 Fix for broken zoom on Camera Meter
Fixes for a few edge case crashes 4.3.1 11/16/2025 Fixes for iOS 26
Fixes for Camera crashes 4.3.0 11/13/2025 * B&W/Filter Preview Modes
* Improved Camera Performance
* Better control over max/min values
* Enhanced Saved Exposures including GPX export
* Home screen and lock screen widgets
* Bug fixes 4.2.0 07/10/2025 Added:
* Saved Exposures
* Magic Hour Calculator
* Bellows Calculator
* Custom Equipment
* EXIF Reader,
* Grey Card,
AND MORE! 4.0.1 03/22/2025 Bug fixes
Add option to use decimals in ISOs
Fix camera aspect ratio on some devices 3.1.1. 04/10/2023 Added timer for long exposures.
Bug fixes.
Added additional films for compensation calculations. 3.0.2 03/10/2023 Updated for latest iOS
Added Exposure Converter
General performance improvements
Added review prompt 2.3.0 07/17/2022 * Additional functionality added to Manual Calculator 2.2.1 11/23/2021 * Add Depth of Field Calculator
* Add additional film for Reciprocity Calculator
* Bug Fixes 2.1.2 08/01/2021 * Add Depth of Field Calculator
* Add additional film for Reciprocity Calculator
* Bug Fixes 2.1.1 07/24/2021 * Add Depth of Field Calculator
* Add additional film for Reciprocity Calculator
* Bug Fixes 2.1 07/05/2021