Dark Sky Meter Pro

Dark Sky Meter Pro turns your iPhone’s camera into a sky brightness meter. Point at the night sky to get scientific readings in SQM (magnitudes per square arcsecond) and Bortle scale, plus NELM (naked-eye limiting magnitude) and an estimate of visible stars—so you can track light pollution and compare sites. Measure One-tap measurement: cover the lens for a dark frame, then point at the sky. Results in seconds. Device-specific calibration (zero point) for better accuracy; optional FOV setting