Lumen: Pro Light & Color Meter
Precision exposure & color tools.
Turn your iPhone into a professional light and color meter. Perfect for film photography, cinematography, and lighting design.
Powered by Metal. Designed for Glass
Most light meter apps "guess" exposure by sampling a small grid of the image. Lumen is different.
We count every photon. By leveraging the raw power of Apple’s Metal™ graphics engine, Lumen analyzes the entire sensor readout—over 2 million pixels—in real-time.
The Result: A histogram that flows like water. No stutter. No lag. Just an instant, fluid visualization of your light.
The Benefit: You catch the fleeting cloud, the strobe flash, and the sudden practical light change instantly. If your eye sees it, Lumen measures it.