Measure light intensity accurately in various units like lux, foot-candles, and EV using your iPhone's camera. It offers specialized modes for plant growth (PPFD, DLI) and photography (EV), with historical data and export options.
1.0.41
November 8, 2026
New Tools tab with a window tint check: aim the back camera out through the open window, then through the closed glass with the phone flat on it, and Lux Light Meter estimates how much light the glass lets through (VLT %). Standard mode repeats the pair and flags moving clouds, shaking and a changed angle; compare with the minimum % you enter and save the result per window. Reference only, not an official tint meter. History buttons are easier to tap.
MoreThanks for telling us exactly what happened. Ads that open your browser or show back-to-back are not what we want either — we're looking at how often full-screen ads appear in the app.
Yes, Lux Light Meter contains advertisements. As it is a free application, ads are displayed to support its development and maintenance.
Lux Light Meter has a rating of 4.3 stars from 7 ratings. This indicates a generally positive reception from its users.
Currently, Lux Light Meter is only supported on iPhone. There is no information available regarding an Android version at this time.
The latest version of Lux Light Meter is 1.0.39, and it was last updated on November 4, 2026. This suggests a relatively recent update.
Lux Light Meter has an age rating of 17+. This is likely due to the complexity of some of its features or the general nature of utility apps.
Yes, Lux Light Meter can estimate PPFD and DLI for plants, helping users understand their daily light targets based on light source estimates.
Readings are estimated from the iPhone's camera and are considered reflected-light measurements. For absolute numbers, users can set a calibration factor against a trusted reference meter.
Yes, you can export all your saved readings as a CSV file. You can also share a single reading as an image.
