Hilal Astro
Crescent Moon Calculator
Free · Designed for iPad. Not verified for macOS.
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.
Ratings & Reviews
Version 2.5.1
• Improved crescent calculation accuracy across all three criteria (Yallop, Odeh, MABIMS)
• Fixed conjunction time for users in Indonesia, Malaysia, and Pacific regions
• Cleaner fonts for Latin-script languages (English, Indonesian, Malay, Hausa)
• Resolved sharing issue on some devices
• Shared reports now include app links
The developer, Suliman abdullah, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Suliman abdullah
- Size
- 30.5 MB
- Category
- Weather
- Compatibility
Requires iOS 15.0 or later.
- iPhone
Requires iOS 15.0 or later. - iPad
Requires iPadOS 15.0 or later. - iPod touch
Requires iOS 15.0 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
English and 5 more
- English, Arabic, Hausa, Indonesian, Malay, Urdu
- Age Rating
4+
- 4+
- Copyright
- © 2026 Suliman Abdullah