Hilal Astro

Hilal Astro — an offline-first Islamic astronomy calculator for crescent moon visibility, built on three internationally recognized criteria:

• Yallop (1998) • Odeh (2006) • MABIMS (2021)

FEATURES

◆ Crescent Visibility Pick a city, use GPS, or enter custom coordinates. Get an instant verdict with illumination percentage and a visual crescent diagram.

◆ Detailed Astronomical Data Moon altitude, azimuth, elongation, crescent age, lag time, and relative altitude after sunset with charts.

◆ Moon Phases View all four lunar phases for any month: New, First Quarter, Full, and Last Quarter — with precise timing.

◆ Planet Positions Track the seven visible planets — Mercury, Venus, Mars, Jupiter, Saturn, Uranus, Neptune — with altitude, azimuth, and distance.

◆ AR Sky View Hold your phone up and see planets, stars, and Messier objects overlaid on the live camera view in their real positions. Magnetic declination corrected via IGRF-14.

◆ Compare Cities Compare crescent visibility across multiple cities simultaneously.

◆ 42 Cities Supported Mecca, Medina, Riyadh, Cairo, Jakarta, Kuala Lumpur, Karachi, Sokoto, New York, Istanbul, and many more.

◆ 6 Languages Arabic, English, Indonesian, Malay, Urdu, Hausa.

◆ Share Results Share calculation results as an image with family and friends.

No ads, no internet, no sign-up. Your privacy is preserved.

The app is an astronomical aid — final moon-sighting decisions remain with the authorized committee in your country.