Lightme provides an iPhone light meter app with in-app purchases available.

apps.apple.com/app/id1509033790
Lightme homepage screenshot

About Lightme

Lightme is a light meter app for iPhone and iPad that measures exposure and shows multiple valid aperture and shutter speed combinations at the same time. It uses one-button metering and places main controls for one-handed use by left-handed and right-handed users. It includes continuous metering, spot metering with variable zoom, average metering, zone system support, reciprocity failure compensation for 25+ films, pinhole mode for user-defined apertures, and incident light metering with calibration using the front-facing camera. The App Store lists it as Free with In-App Purchases, with presets for camera, film and lens setups and a list of more than 70 films.

Key features

  • Shows multiple aperture and shutter speed combinations at once
  • Continuous metering by holding or double-tapping measure button
  • Spot metering with variable zoom and average metering
  • Reciprocity failure compensation for 25+ films
  • Pinhole mode with exposure times for user-defined apertures
  • Incident light metering with calibration using front camera
Best for: People using manual or film cameras who want exposure readings on iPhone or iPad.
Good for
  • Displays several exposure combinations at once without scrolling a wheel picker
  • Supports one-button metering with one-handed controls
  • Functions are available without required purchase and ads appear only after tapping the Ad button

Lightme at a glance

Type
Website
Pricing
Not confirmed. Check the site
Platforms
iOS, Web
Open source
Not stated
Language
English
Last checked
Oct 5, 2026 · Online when checked
Listed
Oct 5, 2026

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Lightme FAQ

Is Lightme free to use?
The description states the app is free in its functionalities and offers in-app purchases to support the project.
Will I see ads without tapping anything?
No. The description states ads are shown only if you tap the Ad button.
How do I know reciprocity failure compensation is applied?
Exposure times shown in red are being compensated.
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