Light Meter - Exposure Meter
ISO, Shutter Speed, Aperture
Only for iPhone
Free · Designed for iPhone. Not verified for macOS.
iPhone
Meter light in real time and calculate camera-ready ISO, shutter speed, and aperture settings instantly.
Light Meter helps you measure exposure in real time and find the right camera settings faster.
Designed for photographers and filmmakers, the app turns your iPhone into a practical exposure meter for everyday shoots, studio work, portraits, landscapes, and low-light scenes.
Quickly read the light in front of you, lock the settings you want to keep fixed, and let the app calculate the missing exposure value automatically.
Whether you are shooting with a digital camera, film camera, cinema camera, or manual lens, Light Meter helps you work with more confidence before you press the shutter.
• Live Exposure Reading
Measure light in real time and instantly calculate camera-ready exposure settings.
• Lock Any Two Controls
Choose which two settings stay fixed - ISO, shutter speed, or aperture - and let the meter calculate the third automatically.
• Shutter Priority
Freeze motion or create blur while the app calculates the right aperture.
• Aperture Priority
Set your depth of field and let the meter solve the matching shutter speed.
• Auto ISO
Keep shutter speed and aperture fixed while the meter adjusts ISO automatically.
• Spot Metering
Tap the preview to meter a specific part of the scene with more precision.
• Built for Real Shoots
Use it for portraits, landscapes, studio lighting, street photography, film photography, and video exposure planning.
Light Meter gives you a fast, visual way to understand exposure before shooting. It is especially useful when working with manual cameras, adapting to changing light, checking mixed scenes, or planning a consistent exposure setup.
Simple enough for beginners, precise enough for advanced photographers.
Terms of Use:
https://www.optionalchaining.com/terms-of-use
Privacy Policy:
https://www.optionalchaining.com/privacy-policy
Ratings & Reviews
- This app has not received enough ratings or reviews to display an overview.
The developer, Patrick Battisti Forsthofer, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Provider
- Optional Chaining Technologies Ltda
- Size
- 46.4 MB
- Category
- Photo & Video
- Compatibility
Requires iOS 18.0 or later.
- iPhone
Requires iOS 18.0 or later. - Mac
Requires macOS 15.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 2.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © Optional Chaining Technologies Ltda, 2026