LUX - Illuminance Meter
Productivity
Only for iPhone
Free · In‑App Purchases
iPhone
Quickly check the brightness of any room, workspace, or setup. Tap to measure, hold to freeze. Export history to CSV with Premium. No account required.
LUX is a light meter app that measures illuminance (lux) wherever you are. Open the app and instantly see how bright your space is.
When to use it
- Check lighting in your living room, office, or study area
- Set up photography or video shoots
- Compare brightness between rooms or times of day
- Verify light levels for plants or aquariums
- Confirm any task has the right brightness
Features
- Instant measurement on launch
- Hold the value or freeze the screen
- Measurement history (Premium)
- CSV export (Premium)
- PPFD reading for plant lighting (Premium)
Measurements are processed on-device.
Terms of Use: https://lux-support.web.app/en/terms-of-use.html
Privacy Policy: https://lux-support.web.app/en/privacy-policy.html
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
・bug fix
The developer, koji torishima, 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 Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Usage Data
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
- Seller
- koji torishima
- Size
- 12.9 MB
- Category
- Productivity
- Compatibility
Requires iOS 18.0 or later.
- iPhone
Requires iOS 18.0 or later. - Apple Vision
Requires visionOS 2.0 or later.
- iPhone
- Languages
- English and Japanese
- Age Rating
4+
- 4+
- Contains
Advertising
- In-App Purchases
Yes
- Yearly Plan $14.99
- Monthly Plan $1.99
- Copyright
- Copyright © 2025 Koji Torishima All Rights Reserved.