Measure ambient light levels in lux or foot-candles instantly. Useful for photography, plant care, or verifying brightness for various tasks. Offers advanced features like color temperature and measurement history for premium users.
2.3.0
June 23, 2026
- Added "Lifetime Pro" — a one-time purchase that permanently removes ads and unlocks history, CSV export, and PPFD. - Added a 7-day free trial to the monthly and yearly plans. - Paywall and purchase-flow improvements, plus bug fixes.
MoreUnlock all premium features with no ads.
LUX is a light meter app that measures illuminance (lux) in your surroundings. It's useful for checking lighting in rooms, setting up photography, verifying light for plants, and ensuring tasks have adequate brightness.
Yes, LUX contains advertisements. As a free app with in-app purchases, advertisements are displayed to support its development and availability.
Premium features in LUX include measurement history, CSV export of data, and PPFD readings specifically for plant lighting. These advanced tools are available through subscription plans.
LUX is free to download and use with basic features. Premium features are available through a monthly subscription for $1.99 or a yearly subscription for $14.99.
LUX is currently supported on iPhones. The app is designed to leverage device sensors for accurate light measurements.
The latest version of LUX is 2.2.2, last updated on May 24, 2026. Updates typically bring new features, bug fixes, and performance improvements.
Yes, CSV export is available as a premium feature in LUX. This allows users to save and analyze their measurement data outside of the app.
LUX has an age rating of 4+. This indicates it is suitable for children and adults, with no mature content.
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