Camera Light Meter

Turn your iPhone into a precision light meter. Incident & reflected metering, full stop tables, and ΔEV accuracy — everything your film camera wishes it had built in.

Glowdex is built for shooting: when you’re at a location with a camera in your hand, it turns a live light reading into the exposure setting you need next. On location, in a few steps

• See real‑time brightness (lux) from the camera so you can react as clouds, windows, or subjects move.
• Choose reflected metering (what the frame sees) or incident‑style use (how light falls on the subject)—pick what matches how you’re working that shot.
• Lock shutter, get aperture — or lock aperture, get shutter: the app snaps your answer to real whole, half, or third stops.
• Set ISO to match your film or digital body; lists follow the same stop spacing you’re used to on a dial. Less menu diving, more shooting
• Presets for recurring kits or locations—one tap back to your usual ISO, fixed shutter or aperture, and metering mode.
• Front or rear camera when you need to meter from a different angle without moving your whole rig.