Hilal Astro
Crescent Moon Calculator
About
An offline Islamic astronomy calculator for crescent moon visibility, offering detailed astronomical data and planet positions. Features augmented reality sky view and supports multiple cities and languages.
What's New in Hilal Astro
2.5.1
May 14, 2026
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
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FAQ
What is Hilal Astro used for?
Hilal Astro is an offline-first Islamic astronomy calculator designed to determine crescent moon visibility based on internationally recognized criteria. It also provides detailed astronomical data for celestial bodies.
Does Hilal Astro require an internet connection?
No, Hilal Astro is an offline-first application and does not require an internet connection to function. This ensures privacy and accessibility without data usage.
What astronomical criteria does Hilal Astro use?
Hilal Astro utilizes three internationally recognized criteria for crescent moon visibility: Yallop (1998), Odeh (2006), and MABIMS (2021).
What kind of astronomical data does Hilal Astro provide?
It offers data such as moon altitude, azimuth, elongation, crescent age, lag time, and relative altitude after sunset, along with charts. It also tracks the seven visible planets.
Does Hilal Astro have ads?
Yes, Hilal Astro contains advertisements. The app is free to use, and advertisements are displayed to support its development.
What devices is Hilal Astro available on?
Hilal Astro is available on iPhone and iPad devices. It is designed for iOS users.
How often is Hilal Astro updated?
The latest version, 2.5.1, was released on May 14, 2026. Updates are released periodically to improve functionality and accuracy.
What languages does Hilal Astro support?
Hilal Astro supports six languages: Arabic, English, Indonesian, Malay, Urdu, and Hausa, making it accessible to a global audience.